Ireland: All Towns
Counties
The population of all counties of the Republic of Ireland by census years.
| Name | Status | Population Census 1991-04-21 | Population Census 1996-04-28 | Population Census 2002-04-28 | Population Census 2006-04-23 | Population Census 2011-04-10 | Population Census 2016-04-24 | |
|---|---|---|---|---|---|---|---|---|
| Carlow | County | 40,942 | 41,616 | 46,014 | 50,349 | 54,612 | 56,932 | → |
| Cavan | County | 52,796 | 52,944 | 56,546 | 64,003 | 73,183 | 76,176 | → |
| Clare | County | 90,918 | 94,006 | 103,277 | 110,950 | 117,196 | 118,817 | → |
| Cork | County | ... | ... | ... | ... | 319,494 | 333,213 | → |
| Cork City | City | ... | ... | ... | ... | 199,538 | 209,655 | → |
| Donegal | County | 128,117 | 129,994 | 137,575 | 147,264 | 161,137 | 159,192 | → |
| Dublin City | City | 478,389 | 481,854 | 495,781 | 506,211 | 527,612 | 554,554 | → |
| Dún Laoghaire-Rathdown | County | 185,410 | 189,999 | 191,792 | 194,038 | 206,261 | 218,018 | → |
| Fingal | County | 152,766 | 167,683 | 196,413 | 239,992 | 273,991 | 296,020 | → |
| Galway | County | 129,511 | 131,613 | 143,245 | 159,256 | 175,124 | 179,390 | → |
| Galway City | City | 50,853 | 57,241 | 65,832 | 72,414 | 75,529 | 78,668 | → |
| Kerry | County | 121,894 | 126,130 | 132,527 | 139,835 | 145,502 | 147,707 | → |
| Kildare | County | 122,656 | 134,992 | 163,944 | 186,335 | 210,312 | 222,504 | → |
| Kilkenny | County | 73,635 | 75,336 | 80,339 | 87,558 | 95,419 | 99,232 | → |
| Laois (Laoighis) | County | 52,314 | 52,945 | 58,774 | 67,059 | 80,559 | 84,697 | → |
| Leitrim | County | 25,301 | 25,057 | 25,799 | 28,950 | 31,798 | 32,044 | → |
| Limerick | City and County | 161,956 | 165,042 | 175,304 | 184,055 | 191,809 | 194,899 | → |
| Longford | County | 30,296 | 30,166 | 31,068 | 34,391 | 39,000 | 40,873 | → |
| Louth | County | 90,724 | 92,166 | 101,821 | 111,267 | 122,897 | 128,884 | → |
| Mayo | County | 110,713 | 111,524 | 117,446 | 123,839 | 130,638 | 130,507 | → |
| Meath | County | 105,370 | 109,732 | 134,005 | 162,831 | 184,135 | 195,044 | → |
| Monaghan | County | 51,293 | 51,313 | 52,593 | 55,997 | 60,483 | 61,386 | → |
| Offaly | County | 58,494 | 59,117 | 63,663 | 70,868 | 76,687 | 77,961 | → |
| Roscommon | County | 51,897 | 51,975 | 53,774 | 58,768 | 64,065 | 64,544 | → |
| Sligo | County | 54,756 | 55,821 | 58,200 | 60,894 | 65,393 | 65,535 | → |
| South Dublin | County | 208,739 | 218,728 | 238,835 | 246,935 | 265,205 | 278,767 | → |
| Tipperary | County | 132,772 | 133,535 | 140,131 | 149,244 | 158,754 | 159,553 | → |
| Waterford | City and County | 91,624 | 94,680 | 101,546 | 107,961 | 113,795 | 116,176 | → |
| Westmeath | County | 61,880 | 63,314 | 71,858 | 79,346 | 86,164 | 88,770 | → |
| Wexford | County | 102,069 | 104,371 | 116,596 | 131,749 | 145,320 | 149,722 | → |
| Wicklow | County | 97,265 | 102,683 | 114,676 | 126,194 | 136,640 | 142,425 | → |
| Ireland (Éire) | Republic | 3,525,719 | 3,626,087 | 3,917,203 | 4,239,848 | 4,588,252 | 4,761,865 |
Contents: Towns
The population of all agglomerations (so-called "aggregate towns") and census towns in the Republic of Ireland.
icon links to further information about a selected place including its population structure (gender, age groups, age distribution, citizenship, country of birth, ethnic group, religion, irish language (a3+)).| Name | Status | County | Population Census 1991-04-21 | Population Census 1996-04-28 | Population Census 2002-04-28 | Population Census 2006-04-23 | Population Census 2011-04-10 | Population Census 2016-04-24 | |
|---|---|---|---|---|---|---|---|---|---|
| Abbeydorney | Census Town | Kerry | 179 | 159 | 218 | 244 | 412 | 418 | → |
| Abbeyfeale | Census Town | Limerick | 1,501 | 1,486 | 1,683 | 1,940 | 2,007 | 2,023 | → |
| Abbeyknockmoy | Census Town | Galway | ... | ... | ... | ... | ... | 262 | → |
| Abbeyleix | Census Town | Laois | 1,299 | 1,259 | 1,383 | 1,568 | 1,827 | 1,770 | → |
| Adamstown | Census Town | Wexford | ... | ... | 176 | 173 | 258 | 293 | → |
| Adare | Census Town | Limerick | 899 | 1,042 | 1,102 | 982 | 1,106 | 1,129 | → |
| Aghada - Farsid - Rostellan | Census Town | Cork | 793 | 786 | 774 | 904 | 1,015 | 1,030 | → |
| Aglish | Census Town | Waterford | ... | ... | 193 | 169 | 343 | 333 | → |
| Ahascragh | Census Town | Galway | 211 | 240 | 271 | 221 | 205 | 195 | → |
| Ailt an Chorráin (Burtonport) | Census Town | Donegal | 278 | 296 | 346 | 270 | 323 | 304 | → |
| Allenwood | Census Town | Kildare | 303 | 341 | 481 | 667 | 845 | 981 | → |
| Anagaire (Annagry) | Census Town | Donegal | 199 | 205 | 247 | 223 | 253 | 236 | → |
| An Bun Beag - Doirí Beaga (Bunbeg - Derrybeg) | Census Town | Donegal | 1,427 | 1,400 | 1,388 | 1,359 | 1,553 | 1,491 | → |
| An Charraig (Carrick) | Census Town | Donegal | 267 | 257 | 245 | 253 | 282 | 265 | → |
| An Cheathrú Rua (Carraroe) | Census Town | Galway | 225 | 242 | 629 | 627 | 814 | 781 | → |
| An Clochán Liath (Dungloe) | Census Town | Donegal | 988 | 1,042 | 946 | 1,068 | 1,183 | 1,164 | → |
| An Daingean (Dingle) | Census Town | Kerry | 1,272 | 1,536 | 1,828 | 1,920 | 1,965 | 2,050 | → |
| An Fál Carrach (Falcarragh, Cross Roads) | Census Town | Donegal | 951 | 961 | 852 | 842 | 860 | 764 | → |
| Annacotty | Census Town | Limerick | 546 | 586 | 1,342 | 1,839 | 2,856 | 2,930 | → |
| Annagassan | Census Town | Louth | ... | ... | ... | ... | 180 | 201 | → |
| Annaghdown | Census Town | Galway | ... | ... | ... | 227 | 234 | 198 | → |
| Annascaul | Census Town | Kerry | 215 | 203 | 202 | 271 | 299 | 318 | → |
| Annayalla (Annyalla) | Census Town | Monaghan | ... | ... | ... | ... | ... | 228 | → |
| An Rinn (Ring) | Census Town | Waterford | 281 | 289 | 332 | 384 | 500 | 499 | → |
| An Spidéal (Spiddle) | Census Town | Galway | ... | ... | 190 | 247 | 250 | 237 | → |
| Ardagh | Census Town | Limerick | 316 | 328 | 270 | 271 | 288 | 266 | → |
| Ardara | Census Town | Donegal | 653 | 635 | 578 | 564 | 731 | 732 | → |
| Ardee | Agglomeration | Louth | 3,604 | 3,791 | 3,948 | 4,694 | 4,927 | 4,928 | → |
| Ardfert | Census Town | Kerry | 677 | 648 | 691 | 729 | 800 | 749 | → |
| Ardfinnan | Census Town | Tipperary | 868 | 848 | 779 | 747 | 946 | 899 | → |
| Ardmore | Census Town | Waterford | 375 | 436 | 459 | 412 | 435 | 434 | → |
| Ardnacrusha (Castlebank) | Census Town | Clare | 570 | 655 | 926 | 1,169 | 1,414 | 1,383 | → |
| Ardskeagh | Census Town | Clare | ... | ... | 149 | 245 | 297 | 289 | → |
| Arklow | Agglomeration | Wicklow | 7,987 | 8,557 | 9,993 | 11,759 | 13,009 | 13,163 | → |
| Arthurstown | Census Town | Wexford | ... | ... | ... | 159 | 135 | 121 | → |
| Arva | Census Town | Cavan | 319 | 327 | 357 | 364 | 380 | 411 | → |
| Ashbourne | Census Town | Meath | 4,411 | 4,999 | 6,362 | 8,528 | 11,355 | 12,679 | → |
| Ashford | Census Town | Wicklow | 878 | 1,215 | 1,356 | 1,349 | 1,449 | 1,425 | → |
| Askeaton | Census Town | Limerick | 893 | 851 | 921 | 979 | 1,149 | 1,137 | → |
| Athboy | Census Town | Meath | 1,083 | 1,172 | 1,538 | 2,213 | 2,397 | 2,445 | → |
| Athea | Census Town | Limerick | 455 | 443 | 410 | 377 | 385 | 369 | → |
| Athenry | Census Town | Galway | 1,612 | 1,614 | 2,154 | 3,205 | 3,950 | 4,445 | → |
| Athgarvan | Census Town | Kildare | ... | ... | ... | ... | 1,016 | 1,176 | → |
| Athleague | Census Town | Roscommon | ... | ... | ... | ... | 241 | 248 | → |
| Athlone | Agglomeration | Westmeath / Roscommon | 15,358 | 15,544 | 15,936 | 17,544 | 20,153 | 21,349 | → |
| Athy | Agglomeration | Kildare | 5,204 | 5,306 | 6,049 | 8,218 | 9,926 | 9,677 | → |
| Aughnacliffe | Census Town | Longford | ... | ... | ... | ... | 148 | 177 | → |
| Aughrim | Census Town | Wicklow | 713 | 745 | 871 | 1,145 | 1,364 | 1,442 | → |
| Avoca | Census Town | Wicklow | 494 | 490 | 564 | 734 | 753 | 771 | → |
| Baile an Droichid (Ballindrait) | Census Town | Mayo | ... | ... | ... | ... | ... | 170 | → |
| Baile Chláir (Claregalway) | Census Town | Galway | ... | ... | 562 | 741 | 1,217 | 1,248 | → |
| Baile Mhic Íre (Ballymakeery) | Census Town | Cork | 303 | 294 | 337 | 413 | 425 | 427 | → |
| Bailieborough | Census Town | Cavan | 1,550 | 1,529 | 1,660 | 1,966 | 2,530 | 2,683 | → |
| Balbradagh | Census Town | Meath | ... | ... | ... | 257 | 363 | 374 | → |
| Balbriggan | Agglomeration | Fingal | 7,724 | 8,473 | 10,294 | 15,559 | 19,960 | 21,722 | → |
| Balla | Census Town | Mayo | 337 | 316 | 443 | 586 | 671 | 769 | → |
| Ballaghaderreen | Census Town | Roscommon | 1,270 | 1,248 | 1,416 | 1,720 | 1,822 | 1,808 | → |
| Ballina | Agglomeration | Mayo | 8,167 | 8,762 | 9,647 | 10,409 | 11,086 | 10,171 | → |
| Ballina | Census Town | Tipperary | 477 | 598 | 1,185 | 1,861 | 2,442 | 2,632 | → |
| Ballinabrannagh | Census Town | Carlow | ... | ... | ... | ... | 389 | 466 | → |
| Ballinacarrow | Census Town | Sligo | ... | ... | ... | ... | ... | 202 | → |
| Ballinaclash | Census Town | Wicklow | ... | ... | ... | ... | 301 | 311 | → |
| Ballinagar | Census Town | Offaly | ... | ... | ... | 381 | 420 | 453 | → |
| Ballinagh | Census Town | Cavan | 413 | 401 | 502 | 675 | 766 | 936 | → |
| Ballinakill | Census Town | Laois | 319 | 299 | 328 | 430 | 435 | 445 | → |
| Ballinalack | Census Town | Westmeath | ... | ... | ... | ... | 137 | 137 | → |
| Ballinalee | Census Town | Longford | ... | ... | ... | 151 | 308 | 347 | → |
| Ballinameen | Census Town | Roscommon | ... | ... | ... | ... | 188 | 191 | → |
| Ballinamore | Census Town | Leitrim | 743 | 782 | 687 | 805 | 889 | 914 | → |
| Ballinasloe | Agglomeration | Galway / Roscommon | 5,892 | 5,723 | 6,219 | 6,303 | 6,659 | 6,662 | → |
| Ballincar | Census Town | Sligo | 429 | 456 | 510 | 526 | 444 | 424 | → |
| Ballinderreen | Census Town | Galway | ... | ... | ... | ... | ... | 483 | → |
| Ballindine | Census Town | Mayo | 232 | 233 | 297 | 249 | 350 | 349 | → |
| Ballineen - Enniskean | Census Town | Cork | 611 | 624 | 619 | 646 | 700 | 692 | → |
| Ballingarry | Census Town | Limerick | 420 | 389 | 348 | 441 | 527 | 521 | → |
| Ballingarry | Census Town | Tipperary | 293 | 315 | 314 | 129 | 293 | 269 | → |
| Ballinlough | Census Town | Roscommon | 228 | 205 | 254 | 262 | 300 | 300 | → |
| Ballinroad | Census Town | Waterford | 235 | 253 | 431 | 794 | 1,097 | 1,161 | → |
| Ballinrobe | Census Town | Mayo | 1,229 | 1,309 | 1,626 | 2,098 | 2,704 | 2,786 | → |
| Ballinspittle | Census Town | Cork | ... | ... | ... | ... | 194 | 224 | → |
| Ballintober | Census Town | Roscommon | ... | ... | ... | ... | 137 | 147 | → |
| Ballintogher | Census Town | Sligo | ... | ... | ... | 182 | 313 | 331 | → |
| Ballintra | Census Town | Donegal | 247 | 217 | 216 | 211 | 209 | 191 | → |
| Ballisodare (Ballysadare) | Census Town | Sligo | 581 | 612 | 853 | 971 | 1,344 | 1,350 | → |
| Ballivor | Census Town | Meath | 341 | 383 | 793 | 1,212 | 1,727 | 1,809 | → |
| Ballon | Census Town | Carlow | 281 | 258 | 284 | 596 | 684 | 712 | → |
| Ballyagran | Census Town | Limerick | 224 | 215 | 185 | 183 | 190 | 179 | → |
| Ballybay | Agglomeration | Monaghan | 1,156 | 1,152 | 1,064 | 1,217 | 1,461 | 1,241 | → |
| Ballybofey - Stranorlar | Census Town | Donegal | 2,972 | 3,047 | 3,603 | 4,176 | 4,852 | 4,852 | → |
| Ballyboghil | Census Town | Fingal | 207 | 296 | 313 | 321 | 352 | 447 | → |
| Ballybrittas | Census Town | Laois | ... | ... | ... | ... | 331 | 388 | → |
| Ballybunion | Census Town | Kerry | 1,346 | 1,470 | 1,329 | 1,365 | 1,354 | 1,413 | → |
| Ballycanew | Census Town | Wexford | 287 | 271 | 302 | 464 | 502 | 516 | → |
| Ballycannan | Census Town | Clare | 664 | 662 | 654 | 651 | 646 | 638 | → |
| Ballycastle | Census Town | Mayo | 225 | 234 | 249 | 215 | 234 | 219 | → |
| Ballyclerahan | Census Town | Tipperary | ... | ... | 408 | 678 | 807 | 862 | → |
| Ballyclogh | Census Town | Cork | 232 | 223 | 208 | 177 | 264 | 259 | → |
| Ballycolla | Census Town | Laois | ... | ... | ... | 127 | 138 | 136 | → |
| Ballyconnell | Census Town | Cavan | 465 | 433 | 572 | 747 | 1,061 | 1,105 | → |
| Ballycotton | Census Town | Cork | 444 | 477 | 425 | 412 | 476 | 497 | → |
| Ballycullane | Census Town | Wexford | ... | ... | 207 | 219 | 285 | 318 | → |
| Ballycumber | Census Town | Offaly | 248 | 256 | 248 | 216 | 219 | 208 | → |
| Ballydehob | Census Town | Cork | 266 | 227 | 206 | 240 | 271 | 274 | → |
| Ballydesmond | Census Town | Cork | 211 | 201 | 193 | 191 | 206 | 210 | → |
| Ballyduff | Census Town | Kerry | 670 | 649 | 614 | 578 | 532 | 517 | → |
| Ballyedmond | Census Town | Wexford | ... | ... | ... | ... | 116 | 121 | → |
| Ballyfarnan | Census Town | Roscommon | 241 | 231 | 206 | 182 | 205 | 187 | → |
| Ballyforan | Census Town | Roscommon | ... | ... | ... | ... | 172 | 200 | → |
| Ballygar | Census Town | Galway | 489 | 546 | 642 | 689 | 660 | 687 | → |
| Ballygarvan | Census Town | Cork | ... | ... | ... | 457 | 540 | 556 | → |
| Ballygawley | Census Town | Sligo | ... | ... | ... | 186 | 321 | 310 | → |
| Ballygeary (Rosslare Harbour) | Census Town | Wexford | 983 | 1,023 | 1,038 | 1,041 | 1,123 | 1,200 | → |
| Ballyhack | Census Town | Wexford | 221 | 212 | 210 | 189 | 207 | 206 | → |
| Ballyhahill | Census Town | Limerick | ... | ... | ... | 137 | 170 | 146 | → |
| Ballyhaise | Census Town | Cavan | 438 | 435 | 530 | 597 | 620 | 711 | → |
| Ballyhale | Census Town | Kilkenny | ... | ... | ... | ... | 137 | 174 | → |
| Ballyhaunis | Census Town | Mayo | 1,282 | 1,287 | 1,381 | 1,708 | 2,312 | 2,366 | → |
| Ballyheigue | Census Town | Kerry | 658 | 679 | 626 | 677 | 628 | 724 | → |
| Ballyhogue | Census Town | Wexford | ... | ... | ... | ... | 262 | 269 | → |
| Ballyhooly | Census Town | Cork | 173 | 190 | 179 | 215 | 412 | 475 | → |
| Ballyjamesduff | Census Town | Cavan | 829 | 737 | 871 | 1,690 | 2,568 | 2,661 | → |
| Ballyknockan | Census Town | Wicklow | ... | ... | ... | ... | ... | 227 | → |
| Ballylanders | Census Town | Limerick | 348 | 318 | 333 | 319 | 331 | 308 | → |
| Ballyliffin | Census Town | Donegal | 334 | 299 | 313 | 357 | 461 | 426 | → |
| Ballylinan | Census Town | Laois | 431 | 406 | 430 | 754 | 1,084 | 1,101 | → |
| Ballylongford | Census Town | Kerry | 506 | 499 | 405 | 406 | 418 | 391 | → |
| Ballymacarbry | Census Town | Waterford | ... | ... | ... | ... | 132 | 138 | → |
| Ballymacoda | Census Town | Cork | ... | ... | ... | ... | 128 | 185 | → |
| Ballymahon | Census Town | Longford | 816 | 790 | 827 | 963 | 1,563 | 1,877 | → |
| Ballymore | Census Town | Westmeath | 219 | 212 | 239 | 289 | 433 | 483 | → |
| Ballymore Eustace | Census Town | Kildare | 625 | 719 | 786 | 725 | 872 | 873 | → |
| Ballymote | Census Town | Sligo | 1,014 | 994 | 981 | 1,229 | 1,539 | 1,549 | → |
| Ballymurn | Census Town | Wexford | ... | ... | ... | ... | 464 | 524 | → |
| Ballynacargy | Census Town | Westmeath | 245 | 263 | 260 | 292 | 287 | 277 | → |
| Ballynoe | Census Town | Cork | ... | ... | ... | ... | 146 | 141 | → |
| Ballynonty | Census Town | Tipperary | ... | ... | ... | ... | 152 | 152 | → |
| Ballyoulster | Census Town | Kildare | 431 | 399 | 411 | 895 | 480 | 479 | → |
| Ballyporeen | Census Town | Tipperary | 324 | 293 | 295 | 304 | 313 | 318 | → |
| Ballyragget | Census Town | Kilkenny | 814 | 803 | 821 | 1,014 | 1,089 | 1,082 | → |
| Ballyroan | Census Town | Laois | ... | 173 | 142 | 189 | 455 | 563 | → |
| Ballyroe | Census Town | Kildare | ... | ... | 151 | 202 | 191 | 181 | → |
| Ballysax | Census Town | Kildare | ... | ... | 170 | 270 | 333 | 342 | → |
| Ballyshannon | Agglomeration | Donegal | 2,838 | 2,775 | 2,715 | 2,686 | 2,503 | 2,299 | → |
| Ballysimon | Census Town | Wexford | ... | ... | 217 | 223 | 311 | 319 | → |
| Ballytore | Census Town | Kildare | 293 | 295 | 338 | 445 | 685 | 793 | → |
| Ballyvaughan | Census Town | Clare | 181 | 257 | 201 | 224 | 258 | 191 | → |
| Balrothery | Census Town | Fingal | ... | ... | ... | ... | 1,866 | 2,017 | → |
| Baltimore | Census Town | Cork | 217 | 232 | 383 | 377 | 347 | 323 | → |
| Baltinglass | Census Town | Wicklow | 1,068 | 1,127 | 1,260 | 1,735 | 2,061 | 2,137 | → |
| Baltray | Census Town | Louth | 135 | 130 | 120 | 121 | 103 | 132 | → |
| Banagher | Census Town | Offaly | 1,423 | 1,414 | 1,553 | 1,636 | 1,653 | 1,760 | → |
| Bandon | Agglomeration | Cork | 4,741 | 4,751 | 5,161 | 5,822 | 6,640 | 6,957 | → |
| Bangor Erris | Census Town | Mayo | 262 | 251 | 266 | 295 | 293 | 306 | → |
| Bansha | Census Town | Tipperary | 293 | 288 | 302 | 272 | 349 | 333 | → |
| Banteer | Census Town | Cork | 235 | 257 | 327 | 304 | 323 | 355 | → |
| Bantry | Town | Cork | 2,777 | 2,936 | 3,150 | 3,309 | 3,348 | 2,722 | → |
| Barndarrig | Census Town | Wicklow | ... | ... | ... | ... | 233 | 260 | → |
| Barntown | Census Town | Wexford | 432 | 410 | 394 | 394 | 461 | 459 | → |
| Baylin | Census Town | Westmeath | ... | ... | ... | ... | 244 | 240 | → |
| Béal an Mhuirthead (Belmullet) | Census Town | Mayo | 986 | 954 | 952 | 1,074 | 1,089 | 1,019 | → |
| Béal Átha an Ghaorthaidh (Ballingeary) | Census Town | Cork | 213 | 220 | 205 | 234 | 238 | 235 | → |
| Bearna | Census Town | Galway | ... | ... | ... | ... | 1,878 | 1,998 | → |
| Beaufort | Census Town | Kerry | ... | ... | 159 | 240 | 228 | 251 | → |
| Beaulieu | Census Town | Louth | ... | ... | ... | ... | 221 | 232 | → |
| Belcarra | Census Town | Mayo | ... | ... | ... | ... | 222 | 228 | → |
| Belgooly | Census Town | Cork | ... | ... | ... | 535 | 765 | 826 | → |
| Bellanagare | Census Town | Roscommon | ... | ... | ... | 134 | 142 | 153 | → |
| Bellanode | Census Town | Monaghan | 324 | 391 | 330 | 400 | 473 | 470 | → |
| Bellavary | Census Town | Mayo | ... | ... | ... | 147 | 160 | 159 | → |
| Belmont | Census Town | Offaly | 291 | 257 | 252 | 219 | 209 | 200 | → |
| Belturbet | Agglomeration | Cavan | 1,223 | 1,248 | 1,295 | 1,411 | 1,407 | 1,369 | → |
| Bennettsbridge | Census Town | Kilkenny | 632 | 601 | 735 | 685 | 729 | 745 | → |
| Birr | Agglomeration | Offaly / Tipperary | 4,056 | 4,193 | 4,436 | 5,081 | 5,822 | 4,370 | → |
| Blacklion | Census Town | Cavan | ... | 153 | 166 | 174 | 229 | 194 | → |
| Blarney | Census Town | Cork City | 2,043 | 1,963 | 2,146 | 2,400 | 2,437 | 2,539 | → |
| Blessington | Census Town | Wicklow / Kildare | 1,408 | 1,860 | 2,509 | 4,018 | 5,010 | 5,520 | → |
| Boherbue | Census Town | Cork | 441 | 447 | 379 | 378 | 333 | 334 | → |
| Boherlahan | Census Town | Tipperary | ... | ... | ... | ... | ... | 299 | → |
| Bohola | Census Town | Mayo | ... | ... | ... | ... | 170 | 203 | → |
| Borris | Census Town | Carlow | 588 | 584 | 580 | 582 | 646 | 652 | → |
| Borris-in-Ossory | Census Town | Laois | 332 | 282 | 379 | 488 | 475 | 508 | → |
| Borrisokane | Census Town | Tipperary | 784 | 850 | 832 | 832 | 964 | 942 | → |
| Borrisoleigh | Census Town | Tipperary | 585 | 564 | 598 | 626 | 708 | 679 | → |
| Boyle | Agglomeration | Roscommon | 2,197 | 2,222 | 2,205 | 2,522 | 2,588 | 2,568 | → |
| Bracknagh | Census Town | Offaly | 300 | 281 | 259 | 240 | 209 | 212 | → |
| Bray | Agglomeration | Wicklow / Dublin | 26,953 | 27,923 | 30,951 | 31,901 | 31,872 | 32,600 | → |
| Bree | Census Town | Wexford | ... | ... | ... | ... | 201 | 193 | → |
| Bridebridge | Census Town | Cork | 273 | 250 | 214 | 208 | 203 | 187 | → |
| Bridge End | Census Town | Donegal | ... | ... | 298 | 334 | 497 | 454 | → |
| Bridgetown | Census Town | Wexford | 262 | 246 | 183 | 202 | 385 | 462 | → |
| Brittas | Census Town | South Dublin | 191 | 187 | 174 | 154 | 171 | 179 | → |
| Broadford | Census Town | Limerick | 295 | 271 | 300 | 313 | 295 | 276 | → |
| Brosna | Census Town | Kerry | 259 | 249 | 204 | 212 | 210 | 193 | → |
| Brownstown | Census Town | Kildare | 544 | 462 | 500 | 482 | 846 | 883 | → |
| Bruff | Census Town | Limerick | 850 | 700 | 695 | 724 | 783 | 803 | → |
| Bruree | Census Town | Limerick | 265 | 261 | 299 | 321 | 541 | 580 | → |
| Bunclody - Carrickduff | Census Town | Carlow / Wexford | 1,316 | 1,241 | 1,361 | 1,863 | 2,012 | 1,984 | → |
| Buncrana | Agglomeration | Donegal | 4,388 | 4,805 | 5,271 | 5,911 | 6,839 | 6,785 | → |
| Bundoran | Agglomeration | Donegal | 1,463 | 1,796 | 1,842 | 1,964 | 2,140 | 1,963 | → |
| Bun na Leaca (Brinlack) | Census Town | Donegal | ... | ... | 381 | 392 | 441 | 402 | → |
| Bunnyconnelan West | Census Town | Mayo | ... | ... | ... | 150 | 185 | 188 | → |
| Bunratty | Census Town | Clare | ... | ... | ... | ... | 219 | 349 | → |
| Burnfoot | Census Town | Donegal | 246 | 224 | 240 | 398 | 466 | 450 | → |
| Butlersbridge | Census Town | Cavan | 188 | 185 | 182 | 182 | 282 | 276 | → |
| Buttevant | Census Town | Cork | 1,125 | 1,070 | 987 | 914 | 945 | 970 | → |
| Bweeng | Census Town | Cork | ... | ... | ... | ... | 418 | 524 | → |
| Cabragh (Threemilehouse) | Census Town | Monaghan | ... | ... | 201 | 167 | 159 | 156 | → |
| Caherconlish | Census Town | Limerick | 668 | 636 | 616 | 700 | 1,279 | 1,476 | → |
| Cahir | Census Town | Tipperary | 2,055 | 2,236 | 2,794 | 3,381 | 3,578 | 3,593 | → |
| Cahirciveen (Cahersiveen) | Census Town | Kerry | 1,213 | 1,250 | 1,272 | 1,294 | 1,168 | 1,041 | → |
| Callan | Census Town | Kilkenny | 1,246 | 1,224 | 1,325 | 1,771 | 2,330 | 2,475 | → |
| Calverstown | Census Town | Kildare | ... | ... | ... | 650 | 648 | 699 | → |
| Camolin | Census Town | Wexford | 293 | 299 | 320 | 390 | 393 | 415 | → |
| Campile | Census Town | Wexford | 410 | 396 | 335 | 347 | 411 | 448 | → |
| Cappamore | Census Town | Limerick | 744 | 665 | 684 | 669 | 675 | 620 | → |
| Cappawhite | Census Town | Tipperary | 350 | 345 | 340 | 328 | 369 | 343 | → |
| Cappoquin | Census Town | Waterford | 829 | 780 | 756 | 740 | 759 | 699 | → |
| Carlanstown | Census Town | Meath | ... | ... | ... | 348 | 631 | 664 | → |
| Carlingford | Census Town | Louth | 650 | 647 | 604 | 623 | 1,045 | 1,445 | → |
| Carlow | Agglomeration | Carlow / Laois | 14,027 | 14,979 | 18,487 | 20,724 | 23,030 | 24,272 | → |
| Carndonagh | Census Town | Donegal | 1,541 | 1,580 | 1,673 | 1,923 | 2,534 | 2,471 | → |
| Carnew | Census Town | Wicklow | 737 | 795 | 809 | 949 | 1,091 | 1,052 | → |
| Carney | Census Town | Sligo | ... | ... | ... | 219 | 349 | 395 | → |
| Carragh | Census Town | Kildare | ... | ... | 242 | 751 | 882 | 966 | → |
| Carraig Airt | Census Town | Donegal | ... | ... | ... | 249 | 228 | 222 | → |
| Carrickmacross | Agglomeration | Monaghan | 3,341 | 3,617 | 3,832 | 4,387 | 4,925 | 5,032 | → |
| Carrick-on-Shannon | Census Town | Leitrim / Roscommon | 1,858 | 1,868 | 2,237 | 3,163 | 3,980 | 4,062 | → |
| Carrick-on-Suir | Agglomeration | Tipperary | 5,143 | 5,217 | 5,586 | 5,906 | 5,931 | 5,771 | → |
| Carrigaline | Census Town | Cork | 6,482 | 7,827 | 11,191 | 12,835 | 14,775 | 15,770 | → |
| Carrigallen | Census Town | Leitrim | 243 | 251 | 257 | 303 | 384 | 387 | → |
| Carrigans | Census Town | Donegal | 218 | 185 | 158 | 191 | 336 | 331 | → |
| Carrigkerry | Census Town | Limerick | ... | ... | 173 | 166 | 180 | 184 | → |
| Carrignavar | Census Town | Cork | ... | ... | ... | 482 | 499 | 519 | → |
| Carrigtwohill | Census Town | Cork | 1,212 | 1,232 | 1,411 | 2,782 | 4,551 | 5,080 | → |
| Carrowkeel | Census Town | Donegal | 249 | 268 | 253 | 331 | 388 | 355 | → |
| Cashel | Agglomeration | Tipperary | 2,814 | 2,687 | 2,770 | 2,936 | 4,051 | 4,422 | → |
| Castlebar | Agglomeration | Mayo | 7,648 | 8,532 | 11,371 | 11,891 | 12,318 | 12,068 | → |
| Castlebellingham - Kilsaran | Census Town | Louth | 762 | 792 | 721 | 816 | 1,035 | 1,126 | → |
| Castleblayney | Agglomeration | Monaghan | 2,938 | 2,808 | 2,936 | 3,124 | 3,634 | 3,607 | → |
| Castlebridge - Blackwater | Census Town | Wexford | 696 | 783 | 1,013 | 1,624 | 1,726 | 1,840 | → |
| Castlecomer - Donaguile | Census Town | Kilkenny | 1,396 | 1,380 | 1,482 | 1,531 | 1,456 | 1,502 | → |
| Castleconnell | Census Town | Limerick | 1,391 | 1,414 | 1,343 | 1,330 | 1,917 | 2,107 | → |
| Castledermot | Census Town | Kildare | 741 | 733 | 726 | 887 | 1,398 | 1,475 | → |
| Castle Ellis | Census Town | Wexford | ... | ... | 165 | 173 | 293 | 339 | → |
| Castlefin | Census Town | Donegal | 692 | 698 | 783 | 810 | 787 | 705 | → |
| Castlegregory | Census Town | Kerry | 159 | 163 | 186 | 205 | 243 | 250 | → |
| Castleisland | Census Town | Kerry | 2,207 | 2,233 | 2,162 | 2,300 | 2,513 | 2,486 | → |
| Castlelyons | Census Town | Cork | 164 | 164 | 211 | 203 | 292 | 374 | → |
| Castlemagner | Census Town | Cork | ... | ... | ... | ... | 246 | 281 | → |
| Castlemaine | Census Town | Kerry | ... | ... | ... | ... | 187 | 176 | → |
| Castlemartyr | Census Town | Cork | 587 | 484 | 577 | 978 | 1,277 | 1,600 | → |
| Castlepollard | Census Town | Westmeath | 863 | 888 | 895 | 1,004 | 1,042 | 1,163 | → |
| Castlerea | Census Town | Roscommon | 1,822 | 1,790 | 1,788 | 1,873 | 1,985 | 1,992 | → |
| Castletown | Census Town | Laois | 291 | 294 | 289 | 314 | 418 | 436 | → |
| Castletownbere | Census Town | Cork | 921 | 926 | 875 | 868 | 912 | 860 | → |
| Castletown Geoghegan | Census Town | Westmeath | ... | ... | ... | ... | 150 | 141 | → |
| Castletownroche | Census Town | Cork | 450 | 421 | 423 | 398 | 435 | 454 | → |
| Castletownsend | Census Town | Cork | 147 | 141 | 157 | 188 | 187 | 196 | → |
| Causeway | Census Town | Kerry | 233 | 261 | 251 | 211 | 264 | 257 | → |
| Cavan | Agglomeration | Cavan | 5,254 | 5,623 | 6,098 | 7,883 | 10,205 | 10,914 | → |
| Celbridge | Census Town | Kildare | 9,629 | 12,289 | 16,016 | 17,262 | 19,537 | 20,288 | → |
| Charlestown - Bellahy | Census Town | Mayo / Sligo | 712 | 675 | 753 | 859 | 914 | 1,033 | → |
| Cheekpoint | Census Town | Waterford | 298 | 320 | 325 | 313 | 334 | 318 | → |
| Churchtown | Census Town | Cork | ... | ... | ... | 217 | 509 | 598 | → |
| Cill Charthaigh (Kilcar) | Census Town | Donegal | 307 | 290 | 262 | 232 | 248 | 258 | → |
| Cill Rónáin (Kilronan) | Census Town | Galway | 295 | 265 | 270 | 259 | 297 | 247 | → |
| Clane | Census Town | Kildare | 1,822 | 3,126 | 4,417 | 4,968 | 6,702 | 7,280 | → |
| Clara | Census Town | Offaly | 2,505 | 2,464 | 2,704 | 3,001 | 3,242 | 3,336 | → |
| Claremorris | Census Town | Mayo | 1,907 | 1,914 | 2,101 | 2,595 | 3,412 | 3,687 | → |
| Clarina | Census Town | Limerick | ... | ... | ... | 216 | 275 | 294 | → |
| Clarinbridge | Census Town | Galway | ... | ... | 173 | 257 | 389 | 384 | → |
| Clashmore | Census Town | Waterford | ... | ... | 161 | 224 | 252 | 252 | → |
| Clifden | Census Town | Galway | 808 | 920 | 1,355 | 1,497 | 2,056 | 1,597 | → |
| Cliffoney | Census Town | Sligo | 292 | 305 | 327 | 425 | 483 | 492 | → |
| Cloghan | Census Town | Offaly | 453 | 477 | 523 | 503 | 612 | 601 | → |
| Clogh - Chatsworth | Census Town | Kilkenny | 311 | 272 | 320 | 351 | 358 | 344 | → |
| Clogheen | Census Town | Tipperary | 499 | 518 | 550 | 509 | 491 | 478 | → |
| Clogherhead | Census Town | Louth | 746 | 775 | 906 | 1,558 | 1,993 | 2,145 | → |
| Clonakilty | Agglomeration | Cork | 2,812 | 2,950 | 3,698 | 4,154 | 4,721 | 4,592 | → |
| Clonard | Census Town | Meath | ... | ... | 248 | 347 | 339 | 347 | → |
| Clonaslee | Census Town | Laois | 483 | 504 | 538 | 501 | 518 | 566 | → |
| Clonbullogue | Census Town | Offaly | 335 | 329 | 390 | 442 | 422 | 439 | → |
| Clondrohid | Census Town | Cork | ... | ... | ... | ... | 188 | 179 | → |
| Clondulane | Census Town | Cork | ... | ... | ... | ... | 333 | 417 | → |
| Clonee Village | Census Town | Meath | ... | ... | 173 | 1,000 | 631 | 826 | → |
| Clonegal | Census Town | Carlow / Wexford | 219 | 200 | 193 | 231 | 245 | 278 | → |
| Clones | Agglomeration | Monaghan | 2,347 | 2,170 | 1,947 | 1,767 | 1,761 | 1,680 | → |
| Clongeen | Census Town | Wexford | ... | ... | 224 | 217 | 280 | 267 | → |
| Clonlara | Census Town | Clare | 399 | 401 | 472 | 504 | 627 | 713 | → |
| Clonmany | Census Town | Donegal | 305 | 305 | 393 | 437 | 470 | 428 | → |
| Clonmel | Agglomeration | Tipperary / Waterford | 15,562 | 16,182 | 16,910 | 17,008 | 17,908 | 17,140 | → |
| Clonmellon | Census Town | Westmeath | 295 | 272 | 403 | 547 | 634 | 664 | → |
| Clonroche | Census Town | Wexford | 418 | 407 | 339 | 356 | 329 | 326 | → |
| Clontibret | Census Town | Monaghan | ... | ... | ... | ... | 166 | 172 | → |
| Clontuskert | Census Town | Roscommon | 246 | 262 | 236 | 193 | 188 | 171 | → |
| Clonygowan | Census Town | Offaly | ... | ... | ... | ... | 190 | 198 | → |
| Cloonfad | Census Town | Roscommon | ... | ... | ... | 209 | 285 | 308 | → |
| Cloughduv | Census Town | Cork | ... | ... | ... | 349 | 350 | 360 | → |
| Cloughjordan | Census Town | Tipperary | 476 | 447 | 431 | 394 | 511 | 612 | → |
| Cloyne | Census Town | Cork | 731 | 673 | 785 | 1,095 | 1,562 | 1,803 | → |
| Cluain Bú (Cloonboo) | Census Town | Galway | 252 | 265 | 351 | 306 | 381 | 350 | → |
| Cnoc na Muirleog (Crocknamurleog) | Census Town | Donegal | 307 | 382 | 346 | 346 | 415 | 396 | → |
| Coachford | Census Town | Cork | 433 | 408 | 412 | 439 | 431 | 408 | → |
| Cobh | Agglomeration | Cork | 8,219 | 8,459 | 9,811 | 11,303 | 12,347 | 12,800 | → |
| Coill Dubh (Blackwood) | Census Town | Kildare | 693 | 682 | 592 | 684 | 693 | 746 | → |
| Collinstown | Census Town | Westmeath | ... | 212 | 229 | 294 | 336 | 356 | → |
| Collon | Census Town | Louth | 335 | 308 | 424 | 564 | 814 | 896 | → |
| Collooney | Census Town | Sligo | 612 | 573 | 619 | 892 | 1,369 | 1,610 | → |
| Cong | Census Town | Galway / Mayo | 183 | 197 | 185 | 150 | 178 | 145 | → |
| Conna | Census Town | Cork | 217 | 209 | 258 | 376 | 470 | 526 | → |
| Convoy | Census Town | Donegal | 911 | 907 | 1,028 | 1,193 | 1,438 | 1,526 | → |
| Coolagary (Walsh Island) | Census Town | Offaly | 232 | 239 | 241 | 365 | 458 | 443 | → |
| Coolaney | Census Town | Sligo | ... | ... | 167 | 208 | 866 | 990 | → |
| Coolboy | Census Town | Wicklow | ... | ... | ... | ... | 144 | 267 | → |
| Coolgreany | Census Town | Wexford | 380 | 356 | 398 | 360 | 370 | 376 | → |
| Cootehall | Census Town | Roscommon | ... | ... | ... | ... | ... | 184 | → |
| Cootehill | Agglomeration | Cavan | 1,791 | 1,822 | 1,744 | 1,892 | 2,123 | 1,853 | → |
| Cork | Agglomeration | Cork City / Cork | 174,400 | 179,954 | 186,239 | 190,384 | 198,582 | 208,669 | → |
| Corofin | Census Town | Clare | 382 | 418 | 382 | 485 | 689 | 776 | → |
| Corrandulla | Census Town | Galway | ... | ... | ... | ... | ... | 241 | → |
| Corrofin | Census Town | Galway | ... | ... | ... | 380 | 549 | 627 | → |
| Courtbrack | Census Town | Cork | ... | ... | ... | ... | ... | 194 | → |
| Courtmacsherry | Census Town | Cork | 204 | 224 | 259 | 244 | 520 | 590 | → |
| Courtown Harbour - Riverchapel - Ardamine | Census Town | Wexford | 343 | 364 | 502 | 1,421 | 2,857 | 3,591 | → |
| Cratloe | Census Town | Clare | 510 | 557 | 656 | 643 | 674 | 692 | → |
| Craughwell | Census Town | Galway | 232 | 240 | 358 | 414 | 665 | 769 | → |
| Creeslough | Census Town | Donegal | 299 | 300 | 304 | 327 | 410 | 393 | → |
| Crinkle (Crinkill) | Census Town | Offaly | ... | ... | ... | ... | ... | 682 | → |
| Croagh | Census Town | Limerick | ... | ... | ... | ... | 222 | 216 | → |
| Cromane | Census Town | Kerry | 157 | 136 | 125 | 139 | 115 | 116 | → |
| Crookstown | Census Town | Cork | 353 | 345 | 320 | 302 | 285 | 245 | → |
| Croom | Census Town | Limerick | 1,090 | 1,009 | 1,056 | 1,045 | 1,157 | 1,159 | → |
| Crossakeel | Census Town | Meath | ... | ... | ... | ... | 180 | 181 | → |
| Crossbarry | Census Town | Cork | ... | ... | ... | ... | 354 | 368 | → |
| Crosshaven - Churchbay | Census Town | Cork | 1,583 | 1,569 | 1,643 | 1,921 | 2,415 | 2,577 | → |
| Crossmolina | Census Town | Mayo | 1,202 | 1,103 | 935 | 930 | 1,061 | 1,044 | → |
| Crusheen | Census Town | Clare | ... | ... | ... | 377 | 467 | 543 | → |
| Culdaff | Census Town | Donegal | ... | ... | 182 | 155 | 264 | 237 | → |
| Daingean | Census Town | Offaly | 641 | 679 | 777 | 1,056 | 1,037 | 1,077 | → |
| Danescastle | Census Town | Wexford | ... | ... | 168 | 218 | 306 | 258 | → |
| Delvin | Census Town | Westmeath | 305 | 305 | 271 | 416 | 697 | 740 | → |
| Derrinturn | Census Town | Kildare | 553 | 544 | 791 | 1,138 | 1,541 | 1,602 | → |
| Donabate | Census Town | Fingal | 1,104 | 1,868 | 3,854 | 5,499 | 6,778 | 7,443 | → |
| Donard | Census Town | Wicklow | 165 | 162 | 201 | 182 | 187 | 196 | → |
| Donaskeigh | Census Town | Tipperary | ... | ... | ... | ... | 147 | 144 | → |
| Donegal | Census Town | Donegal | 2,193 | 2,296 | 2,453 | 2,339 | 2,607 | 2,618 | → |
| Doneraile | Census Town | Cork | 815 | 761 | 800 | 759 | 757 | 780 | → |
| Donore | Census Town | Meath | 277 | 293 | 334 | 728 | 692 | 760 | → |
| Doohamlat (Doohamlet) | Census Town | Monaghan | ... | ... | ... | ... | ... | 257 | → |
| Doohooma (Dumha Thuama) | Census Town | Mayo | ... | ... | ... | ... | ... | 112 | → |
| Doon | Census Town | Limerick | 397 | 388 | 407 | 439 | 509 | 516 | → |
| Doonbeg | Census Town | Clare | 225 | 220 | 206 | 228 | 272 | 262 | → |
| Drangan | Census Town | Tipperary | ... | ... | ... | ... | 136 | 145 | → |
| Drimoleague | Census Town | Cork | 344 | 339 | 363 | 436 | 468 | 451 | → |
| Drogheda | Agglomeration | Louth / Meath | 24,656 | 25,282 | 31,020 | 35,090 | 38,578 | 40,956 | → |
| Droichead Nua (Newbridge) | Agglomeration | Kildare | 12,069 | 13,363 | 16,739 | 18,520 | 21,561 | 22,742 | → |
| Dromahair | Census Town | Leitrim | 329 | 346 | 312 | 503 | 748 | 808 | → |
| Dromina | Census Town | Cork | 229 | 207 | 190 | 213 | 269 | 275 | → |
| Dromineer | Census Town | Tipperary | ... | ... | ... | 118 | 113 | 102 | → |
| Dromiskin | Census Town | Louth | 443 | 629 | 949 | 992 | 1,115 | 1,195 | → |
| Drommahane | Census Town | Cork | 622 | 540 | 548 | 801 | 872 | 959 | → |
| Dromore West | Census Town | Sligo | ... | ... | ... | ... | 218 | 227 | → |
| Drumcollogher | Census Town | Limerick | 387 | 485 | 496 | 524 | 548 | 518 | → |
| Drumconrath | Census Town | Meath | 345 | 351 | 389 | 405 | 370 | 345 | → |
| Drumkeen | Census Town | Donegal | ... | ... | ... | ... | 151 | 193 | → |
| Drumkeeran | Census Town | Leitrim | 244 | 220 | 242 | 249 | 252 | 220 | → |
| Drumlish | Census Town | Longford | 275 | 274 | 277 | 429 | 835 | 931 | → |
| Drumod | Census Town | Leitrim | ... | ... | ... | 210 | 432 | 555 | → |
| Drumshanbo | Census Town | Leitrim | 588 | 634 | 623 | 665 | 857 | 902 | → |
| Drumsna | Census Town | Leitrim | 160 | 143 | 173 | 217 | 247 | 240 | → |
| Duagh | Census Town | Kerry | ... | ... | ... | ... | 209 | 222 | → |
| Dublin (Baile Átha Cliath) | Agglomeration | Dublin City / South Dublin / Dún Laoghaire-Rathdown / Fingal | 929,090 | 952,692 | 1,004,614 | 1,045,769 | 1,110,627 | 1,173,179 | → |
| Duleek | Census Town | Meath | 1,718 | 1,731 | 2,173 | 3,236 | 3,988 | 4,219 | → |
| Dunboyne | Census Town | Meath | 2,392 | 3,080 | 5,363 | 5,713 | 6,959 | 7,272 | → |
| Duncannon | Census Town | Wexford | 339 | 318 | 303 | 291 | 328 | 305 | → |
| Duncormick | Census Town | Wexford | ... | ... | ... | ... | ... | 116 | → |
| Dundalk | Agglomeration | Louth | 30,061 | 30,195 | 32,505 | 35,085 | 37,816 | 39,004 | → |
| Dunderrow | Census Town | Cork | ... | ... | ... | ... | 197 | 208 | → |
| Dunderry | Census Town | Meath | ... | ... | ... | ... | 186 | 170 | → |
| Dundrum | Census Town | Tipperary | 247 | 219 | 191 | 191 | 220 | 165 | → |
| Dunfanaghy | Census Town | Donegal | 280 | 290 | 293 | 316 | 312 | 298 | → |
| Dungarvan | Agglomeration | Waterford | 6,920 | 7,175 | 7,452 | 8,362 | 9,427 | 9,227 | → |
| Dunhill | Census Town | Waterford | ... | ... | ... | 177 | 209 | 216 | → |
| Dunkineely | Census Town | Donegal | 410 | 395 | 353 | 363 | 375 | 361 | → |
| Dunlavin | Census Town | Wicklow | 720 | 693 | 814 | 849 | 830 | 838 | → |
| Dunleer | Census Town | Louth | 1,104 | 988 | 1,014 | 1,449 | 1,786 | 1,822 | → |
| Dunmanway | Census Town | Cork | 1,404 | 1,427 | 1,532 | 1,522 | 1,585 | 1,655 | → |
| Dunmore | Census Town | Galway | 427 | 445 | 594 | 614 | 577 | 600 | → |
| Dunmore East | Census Town | Waterford | 1,038 | 1,430 | 1,750 | 1,547 | 1,559 | 1,808 | → |
| Dunshaughlin | Census Town | Meath | 1,275 | 2,139 | 3,063 | 3,384 | 3,903 | 4,035 | → |
| Durrow | Census Town | Laois | 721 | 696 | 717 | 811 | 843 | 835 | → |
| Durrus | Census Town | Cork | 188 | 204 | 283 | 313 | 334 | 305 | → |
| Easky | Census Town | Sligo | 165 | 174 | 211 | 240 | 245 | 239 | → |
| Edenderry | Agglomeration | Offaly | 3,742 | 3,825 | 4,559 | 5,888 | 6,977 | 7,359 | → |
| Elphin | Census Town | Roscommon | 525 | 545 | 527 | 591 | 613 | 565 | → |
| Emly | Census Town | Tipperary | 334 | 324 | 278 | 293 | 348 | 302 | → |
| Emo | Census Town | Laois | ... | 231 | 220 | 225 | 245 | 257 | → |
| Emyvale | Census Town | Monaghan | 479 | 484 | 583 | 683 | 696 | 701 | → |
| Enfield | Census Town | Meath | 436 | 566 | 1,072 | 2,161 | 2,929 | 3,239 | → |
| Ennis | Agglomeration | Clare | 16,058 | 17,726 | 22,051 | 24,253 | 25,360 | 25,276 | → |
| Enniscorthy | Agglomeration | Wexford | 7,655 | 7,640 | 8,964 | 9,538 | 10,838 | 11,381 | → |
| Enniskerry | Census Town | Wicklow | 1,238 | 1,275 | 1,904 | 1,881 | 1,811 | 1,889 | → |
| Ennistymon | Census Town | Clare | 917 | 920 | 881 | 813 | 957 | 1,045 | → |
| Erril | Census Town | Laois | ... | ... | ... | 158 | 196 | 182 | → |
| Eyrecourt | Census Town | Galway | 358 | 337 | 354 | 292 | 264 | 252 | → |
| Fahan | Census Town | Donegal | 309 | 284 | 338 | 417 | 569 | 588 | → |
| Farran | Census Town | Cork | 332 | 331 | 368 | 338 | 335 | 345 | → |
| Feakle | Census Town | Clare | 161 | 159 | 149 | 122 | 113 | 105 | → |
| Fedamore | Census Town | Limerick | ... | ... | ... | 215 | 298 | 329 | → |
| Fenit | Census Town | Kerry | 403 | 390 | 433 | 435 | 527 | 538 | → |
| Fennagh | Census Town | Carlow | ... | ... | ... | ... | 384 | 402 | → |
| Ferbane | Census Town | Offaly | 1,285 | 1,270 | 1,198 | 1,164 | 1,165 | 1,191 | → |
| Fermoy | Agglomeration | Cork | 4,462 | 4,469 | 4,804 | 5,873 | 6,489 | 6,585 | → |
| Ferns | Census Town | Wexford | 859 | 915 | 985 | 954 | 1,362 | 1,415 | → |
| Fethard | Census Town | Tipperary | 1,431 | 1,397 | 1,388 | 1,374 | 1,541 | 1,545 | → |
| Fethard-on-Sea | Census Town | Wexford | 256 | 290 | 302 | 326 | 321 | 311 | → |
| Fiddown | Census Town | Kilkenny | ... | ... | ... | 194 | 366 | 369 | → |
| Fieries | Census Town | Kerry | ... | ... | ... | ... | 491 | 558 | → |
| Fountainstown | Census Town | Cork | 812 | 857 | 852 | 887 | 894 | 993 | → |
| Foxford | Census Town | Mayo | 974 | 944 | 878 | 1,058 | 1,326 | 1,315 | → |
| Foynes | Census Town | Limerick | 650 | 558 | 491 | 606 | 542 | 520 | → |
| Freemount | Census Town | Cork | ... | ... | ... | ... | ... | 159 | → |
| Frenchpark | Census Town | Roscommon | 272 | 290 | 358 | 454 | 420 | 454 | → |
| Freshford | Census Town | Kilkenny | 651 | 632 | 756 | 734 | 685 | 662 | → |
| Galbally | Census Town | Limerick | 244 | 246 | 235 | 257 | 238 | 251 | → |
| Galway | Agglomeration | Galway City / Galway | 50,853 | 57,363 | 66,163 | 72,729 | 76,778 | 79,934 | → |
| Garristown | Census Town | Fingal | 224 | 228 | 289 | 257 | 433 | 509 | → |
| Geashill | Census Town | Offaly | 375 | 363 | 344 | 328 | 375 | 395 | → |
| Glanworth | Census Town | Cork | 390 | 400 | 378 | 432 | 547 | 603 | → |
| Glassan | Census Town | Westmeath | 212 | 198 | 216 | 166 | 198 | 207 | → |
| Glasslough | Census Town | Monaghan | 305 | 306 | 296 | 290 | 348 | 453 | → |
| Gleann Cholm Cille | Census Town | Donegal | 259 | 236 | 254 | 238 | 212 | 217 | → |
| Glen | Census Town | Limerick | ... | ... | 216 | 420 | 455 | 450 | → |
| Glenamaddy | Census Town | Galway | 338 | 394 | 457 | 502 | 500 | 480 | → |
| Glenbeigh | Census Town | Kerry | 230 | 251 | 330 | 280 | 285 | 308 | → |
| Glencullen | Census Town | Dún Laoghaire- Rathdown | ... | ... | 204 | 189 | 268 | 238 | → |
| Glenealy | Census Town | Wicklow | 361 | 383 | 377 | 528 | 670 | 694 | → |
| Gleneely | Census Town | Donegal | ... | ... | ... | 166 | 208 | 236 | → |
| Glengarriff | Census Town | Cork | ... | ... | ... | ... | ... | 138 | → |
| Glenties | Census Town | Donegal | 802 | 738 | 789 | 811 | 869 | 805 | → |
| Glenville | Census Town | Cork | ... | ... | ... | ... | ... | 531 | → |
| Glin | Census Town | Limerick | 608 | 554 | 560 | 566 | 577 | 576 | → |
| Gneevgullia | Census Town | Kerry | 239 | 230 | 239 | 233 | 256 | 256 | → |
| Gob an Choire (Achill Sound) | Census Town | Mayo | 229 | 277 | 355 | 302 | 275 | 238 | → |
| Golden | Census Town | Tipperary | 293 | 262 | 268 | 255 | 269 | 267 | → |
| Goresbridge | Census Town | Kilkenny | 354 | 407 | 401 | 376 | 361 | 347 | → |
| Gorey | Agglomeration | Wexford | 3,840 | 3,939 | 5,282 | 7,193 | 9,114 | 9,822 | → |
| Gormanston | Census Town | Meath | 819 | 435 | 504 | 355 | 500 | 375 | → |
| Gort | Census Town | Galway | 1,093 | 1,182 | 1,776 | 2,734 | 2,644 | 2,994 | → |
| Gort an Choirce (Gortahork) | Census Town | Donegal | ... | 152 | 155 | 149 | 197 | 185 | → |
| Gortnahoo | Census Town | Tipperary | ... | ... | 207 | 219 | 304 | 286 | → |
| Gowran | Census Town | Kilkenny | 477 | 476 | 454 | 487 | 742 | 804 | → |
| Grahormac | Census Town | Wexford | ... | ... | 162 | 309 | 466 | 439 | → |
| Graiguenamanagh - Tinnahinch | Census Town | Carlow / Kilkenny | 1,395 | 1,374 | 1,435 | 1,376 | 1,543 | 1,475 | → |
| Granard | Town | Longford | 1,221 | 1,173 | 1,013 | 933 | 1,021 | 816 | → |
| Grange | Census Town | Sligo | ... | ... | 225 | 383 | 578 | 586 | → |
| Grangemore | Census Town | Kildare | ... | ... | 171 | 189 | 215 | 217 | → |
| Greencastle | Census Town | Donegal | 588 | 547 | 570 | 530 | 817 | 831 | → |
| Grenagh | Census Town | Cork | ... | ... | ... | ... | 562 | 579 | → |
| Greystones - Delgany | Agglomeration | Wicklow | 10,778 | 11,296 | 11,913 | 14,569 | 17,468 | 18,140 | → |
| Gurteen | Census Town | Sligo | 233 | 257 | 250 | 269 | 349 | 393 | → |
| Hacketstown | Census Town | Carlow | 707 | 628 | 614 | 606 | 600 | 597 | → |
| Halfway | Census Town | Cork | ... | ... | ... | ... | 201 | 226 | → |
| Headford | Census Town | Galway | 600 | 574 | 703 | 760 | 889 | 973 | → |
| Holycross | Census Town | Tipperary | 396 | 447 | 610 | 700 | 714 | 715 | → |
| Hospital | Census Town | Limerick | 723 | 723 | 621 | 628 | 630 | 653 | → |
| Inagh | Census Town | Clare | ... | ... | ... | 170 | 204 | 210 | → |
| Inchigeelagh | Census Town | Cork | 149 | 156 | 157 | 166 | 160 | 153 | → |
| Inistioge | Census Town | Kilkenny | 261 | 260 | 266 | 263 | 260 | 285 | → |
| Inniscrone (Enniscrone) | Census Town | Sligo | 610 | 692 | 668 | 829 | 1,223 | 1,156 | → |
| Innishannon | Census Town | Cork | 319 | 498 | 679 | 678 | 767 | 907 | → |
| Inniskeen | Census Town | Monaghan | 372 | 362 | 310 | 292 | 265 | 273 | → |
| Irishtown | Census Town | Mayo | ... | ... | ... | ... | ... | 129 | → |
| Jenkinstown | Census Town | Louth | 270 | 233 | 263 | 237 | 323 | 360 | → |
| Johnstown | Census Town | Kildare | ... | ... | ... | 899 | 1,004 | 1,005 | → |
| Johnstown | Census Town | Kilkenny | 422 | 460 | 517 | 445 | 472 | 444 | → |
| Johnstownbridge | Census Town | Kildare | ... | ... | 211 | 535 | 650 | 683 | → |
| Julianstown | Census Town | Meath | 450 | 424 | 422 | 615 | 616 | 681 | → |
| Kanturk | Census Town | Cork | 1,777 | 1,666 | 1,651 | 1,915 | 2,263 | 2,350 | → |
| Keadew | Census Town | Roscommon | ... | ... | 194 | 219 | 187 | 154 | → |
| Keel - Dooagh | Census Town | Mayo | 557 | 518 | 541 | 561 | 582 | 541 | → |
| Keenagh | Census Town | Longford | 218 | 223 | 225 | 241 | 498 | 581 | → |
| Kells (Ceannanus Mór) | Agglomeration | Meath | 3,539 | 3,542 | 4,421 | 5,248 | 5,888 | 6,135 | → |
| Kells | Census Town | Kilkenny | ... | ... | 176 | 268 | 281 | 274 | → |
| Kenmare | Census Town | Kerry | 1,366 | 1,420 | 1,844 | 1,701 | 2,175 | 2,376 | → |
| Kentstown | Census Town | Meath | 333 | 324 | 355 | 912 | 1,099 | 1,179 | → |
| Kernanstown | Census Town | Carlow | 287 | 277 | 244 | 230 | 221 | 214 | → |
| Keshcarrigan | Census Town | Leitrim | ... | ... | ... | ... | ... | 155 | → |
| Kilbeggan | Census Town | Westmeath | 617 | 627 | 652 | 822 | 1,199 | 1,288 | → |
| Kilberry | Census Town | Kildare | 501 | 466 | 417 | 421 | 408 | 400 | → |
| Kilbrin | Census Town | Cork | ... | ... | ... | ... | 174 | 186 | → |
| Kilbrittain | Census Town | Cork | ... | ... | ... | 185 | 196 | 216 | → |
| Kilcloon | Census Town | Meath | 351 | 345 | 309 | 281 | 264 | 280 | → |
| Kilcock | Census Town | Kildare | 1,551 | 1,825 | 2,740 | 4,100 | 5,533 | 6,093 | → |
| Kilcolgan | Census Town | Galway | ... | ... | ... | ... | ... | 141 | → |
| Kilcoole | Census Town | Wicklow | 2,485 | 2,694 | 2,826 | 3,252 | 4,049 | 4,239 | → |
| Kilcormac (Frankford) | Census Town | Offaly | 973 | 889 | 879 | 847 | 870 | 935 | → |
| Kilcrohane | Census Town | Cork | ... | ... | ... | ... | 90 | 127 | → |
| Kilcullen | Census Town | Kildare | 1,664 | 1,604 | 1,483 | 2,985 | 3,473 | 3,710 | → |
| Kilcummin | Census Town | Kerry | ... | ... | ... | ... | 368 | 435 | → |
| Kildalkey | Census Town | Meath | ... | 149 | 137 | 518 | 663 | 708 | → |
| Kildangan | Census Town | Kildare | ... | ... | ... | ... | 299 | 317 | → |
| Kildare | Census Town | Kildare | 4,196 | 4,278 | 5,694 | 7,538 | 8,142 | 8,634 | → |
| Kildavin | Census Town | Carlow | ... | ... | ... | 170 | 194 | 184 | → |
| Kildimo | Census Town | Limerick | ... | ... | ... | ... | 409 | 417 | → |
| Kildorrery | Census Town | Cork | 236 | 229 | 215 | 213 | 301 | 357 | → |
| Kildrum | Census Town | Donegal | ... | ... | 267 | 542 | 581 | 534 | → |
| Kildysart | Census Town | Clare | 325 | 301 | 271 | 311 | 378 | 386 | → |
| Kilfenora | Census Town | Clare | ... | ... | 128 | 169 | 220 | 175 | → |
| Kilfinane | Census Town | Limerick | 808 | 766 | 779 | 727 | 778 | 789 | → |
| Kilflynn | Census Town | Kerry | ... | ... | ... | ... | 126 | 151 | → |
| Kilgarvan | Census Town | Kerry | 171 | 175 | 156 | 164 | 181 | 172 | → |
| Kilkee | Agglomeration | Clare | 1,315 | 1,331 | 1,260 | 1,325 | 1,139 | 972 | → |
| Kilkelly | Census Town | Mayo | 263 | 258 | 230 | 389 | 372 | 373 | → |
| Kilkenny | Agglomeration | Kilkenny | 17,669 | 18,696 | 20,735 | 22,179 | 24,423 | 26,512 | → |
| Kilkishen | Census Town | Clare | 406 | 379 | 324 | 443 | 520 | 561 | → |
| Kill | Census Town | Kildare | 1,518 | 1,711 | 2,246 | 2,510 | 3,095 | 3,348 | → |
| Kill | Census Town | Waterford | ... | ... | 173 | 194 | 281 | 271 | → |
| Killala | Census Town | Mayo | 713 | 657 | 650 | 569 | 574 | 562 | → |
| Killaloe | Census Town | Clare | 956 | 972 | 1,174 | 1,035 | 1,292 | 1,484 | → |
| Killarney | Agglomeration | Kerry | 9,950 | 12,011 | 13,137 | 14,603 | 14,219 | 14,504 | → |
| Killashee | Census Town | Longford | ... | ... | ... | ... | 208 | 215 | → |
| Killavullen | Census Town | Cork | 231 | 245 | 224 | 214 | 257 | 267 | → |
| Killeagh | Census Town | Cork | 347 | 362 | 426 | 521 | 721 | 899 | → |
| Killeigh | Census Town | Offaly | ... | 211 | 183 | 159 | 197 | 212 | → |
| Killenard | Census Town | Laois | ... | ... | ... | ... | 622 | 671 | → |
| Killenaule | Census Town | Tipperary | 701 | 725 | 715 | 597 | 713 | 652 | → |
| Killeshandra | Census Town | Cavan | 469 | 427 | 417 | 411 | 364 | 388 | → |
| Killimor | Census Town | Galway | 253 | 256 | 345 | 318 | 335 | 336 | → |
| Killinierin | Census Town | Wexford | ... | ... | ... | ... | 217 | 244 | → |
| Killorglin | Census Town | Kerry | 1,229 | 1,278 | 1,359 | 1,627 | 2,082 | 2,199 | → |
| Killucan - Rathwire | Census Town | Westmeath | 366 | 357 | 575 | 812 | 1,226 | 1,370 | → |
| Killumney | Census Town | Cork | 265 | 509 | 522 | 809 | 1,046 | 1,132 | → |
| Killurin | Census Town | Offaly | ... | ... | ... | ... | 163 | 142 | → |
| Killurin | Census Town | Wexford | ... | ... | ... | ... | ... | 166 | → |
| Killybegs | Census Town | Donegal | 1,522 | 1,408 | 1,396 | 1,280 | 1,297 | 1,236 | → |
| Killygordan | Census Town | Donegal | ... | 390 | 399 | 357 | 608 | 614 | → |
| Kilmacanogue | Census Town | Wicklow | 763 | 818 | 834 | 839 | 1,028 | 1,042 | → |
| Kilmacow | Census Town | Kilkenny | 596 | 599 | 566 | 526 | 627 | 647 | → |
| Kilmacrennan | Census Town | Donegal | 393 | 363 | 430 | 575 | 685 | 753 | → |
| Kilmacthomas | Census Town | Waterford | 694 | 681 | 717 | 783 | 871 | 834 | → |
| Kilmaine | Census Town | Mayo | ... | ... | 184 | 142 | 166 | 147 | → |
| Kilmainham | Census Town | Meath | ... | ... | 237 | 330 | 312 | 316 | → |
| Kilmaley | Census Town | Clare | ... | ... | ... | ... | ... | 202 | → |
| Kilmallock | Census Town | Limerick | 1,311 | 1,231 | 1,362 | 1,443 | 1,635 | 1,668 | → |
| Kilmeade (Kilmead) | Census Town | Kildare | ... | ... | ... | 138 | 299 | 309 | → |
| Kilmeaden | Census Town | Waterford | ... | ... | ... | ... | 193 | 259 | → |
| Kilmeage | Census Town | Kildare | 418 | 451 | 436 | 683 | 997 | 1,082 | → |
| Kilmessan | Census Town | Meath | 242 | 230 | 292 | 341 | 586 | 654 | → |
| Kilmihill | Census Town | Clare | 339 | 357 | 325 | 362 | 426 | 434 | → |
| Kilmoganny | Census Town | Kilkenny | 237 | 247 | 236 | 228 | 226 | 245 | → |
| Kilmore | Census Town | Wexford | ... | ... | ... | ... | ... | 132 | → |
| Kilmore Quay | Census Town | Wexford | 424 | 406 | 417 | 396 | 400 | 372 | → |
| Kilmuckeridge (Ford) | Census Town | Wexford | 223 | 235 | 378 | 467 | 654 | 722 | → |
| Kilmurry (Ballymulcashel) | Census Town | Clare | ... | ... | 255 | 278 | 291 | 280 | → |
| Kilmyshall | Census Town | Wexford | ... | ... | ... | ... | 140 | 149 | → |
| Kilnaleck | Census Town | Cavan | 279 | 253 | 305 | 334 | 384 | 393 | → |
| Kilpedder | Census Town | Wicklow | 406 | 480 | 517 | 480 | 1,287 | 1,255 | → |
| Kilrane | Census Town | Wexford | 214 | 301 | 309 | 432 | 594 | 647 | → |
| Kilrush | Agglomeration | Clare | 2,740 | 2,594 | 2,699 | 2,694 | 2,695 | 2,719 | → |
| Kilsheelan | Census Town | Tipperary | 435 | 461 | 497 | 520 | 809 | 812 | → |
| Kilteel | Census Town | Kildare | ... | ... | ... | ... | 225 | 214 | → |
| Kilteely | Census Town | Limerick | ... | ... | ... | 198 | 214 | 171 | → |
| Kiltimagh | Census Town | Mayo | 952 | 917 | 1,000 | 1,096 | 1,127 | 1,069 | → |
| Kilworth | Census Town | Cork | 403 | 441 | 427 | 645 | 974 | 1,055 | → |
| Kingscourt | Census Town | Cavan | 1,260 | 1,190 | 1,307 | 1,748 | 2,326 | 2,499 | → |
| Kinlough | Census Town | Leitrim | 305 | 286 | 335 | 690 | 1,018 | 1,032 | → |
| Kinnegad | Census Town | Westmeath | 415 | 517 | 1,296 | 2,245 | 2,662 | 2,745 | → |
| Kinnitty | Census Town | Offaly | 265 | 249 | 226 | 333 | 359 | 381 | → |
| Kinsale | Agglomeration | Cork | 2,751 | 3,064 | 3,554 | 4,099 | 4,893 | 5,281 | → |
| Kinsaley | Census Town | Fingal | ... | ... | ... | ... | 214 | 264 | → |
| Kinsealy - Drinan | Census Town | Fingal | 2,084 | 2,182 | 2,110 | 3,651 | 5,814 | 6,643 | → |
| Kinvara | Census Town | Galway | 425 | 432 | 447 | 563 | 620 | 734 | → |
| Knightstown | Census Town | Kerry | 204 | 191 | 172 | 156 | 215 | 243 | → |
| Knock | Census Town | Mayo | 440 | 575 | 595 | 745 | 811 | 972 | → |
| Knockananna | Census Town | Wicklow | ... | ... | ... | ... | 141 | 143 | → |
| Knockbridge | Census Town | Louth | 292 | 274 | 335 | 427 | 583 | 667 | → |
| Knockcroghery | Census Town | Roscommon | ... | ... | ... | ... | 307 | 351 | → |
| Knockglass | Census Town | Cork | ... | ... | 239 | 288 | 443 | 658 | → |
| Knocklong | Census Town | Limerick | 257 | 248 | 204 | 239 | 265 | 256 | → |
| Knocknagree | Census Town | Cork | 199 | 193 | 204 | 189 | 199 | 188 | → |
| Knockraha | Census Town | Cork | ... | ... | ... | 230 | 341 | 371 | → |
| Knocktopher | Census Town | Kilkenny | ... | ... | ... | ... | 144 | 166 | → |
| Lackaghbeg | Census Town | Galway | ... | ... | 220 | 446 | 504 | 545 | → |
| Ladytown | Census Town | Kildare | ... | ... | 242 | 358 | 452 | 460 | → |
| Laghy | Census Town | Donegal | 151 | 144 | 174 | 169 | 197 | 183 | → |
| Lahardane | Census Town | Mayo | ... | ... | ... | ... | 156 | 178 | → |
| Lahinch | Census Town | Clare | 550 | 580 | 625 | 607 | 642 | 638 | → |
| Lanesborough - Ballyleague | Census Town | Longford / Roscommon | 1,054 | 984 | 943 | 1,112 | 1,377 | 1,454 | → |
| Laragh | Census Town | Wicklow | 248 | 267 | 357 | 378 | 340 | 342 | → |
| Lawcus - Stoneyford | Census Town | Kilkenny | ... | ... | 273 | 342 | 355 | 376 | → |
| Laytown - Bettystown - Mornington - Donacarney | Census Town | Meath | 3,360 | 3,678 | 5,597 | 8,978 | 10,889 | 11,872 | → |
| Leap | Census Town | Cork | 169 | 168 | 160 | 242 | 240 | 257 | → |
| Legan | Census Town | Longford | ... | ... | ... | ... | 199 | 215 | → |
| Leighlinbridge | Census Town | Carlow | 510 | 508 | 646 | 674 | 828 | 914 | → |
| Leitrim | Census Town | Leitrim | ... | ... | ... | 258 | 485 | 594 | → |
| Leixlip | Town | Kildare | 13,194 | 13,451 | 15,016 | 14,676 | 15,452 | 15,504 | → |
| Lemybrien | Census Town | Waterford | 222 | 197 | 210 | 194 | 206 | 192 | → |
| Letterkenny | Agglomeration | Donegal | 10,726 | 11,996 | 15,231 | 17,586 | 19,588 | 19,274 | → |
| Lifford | Census Town | Donegal | 1,359 | 1,275 | 1,395 | 1,448 | 1,658 | 1,626 | → |
| Limerick | Agglomeration | Limerick / Clare | 75,436 | 79,137 | 86,998 | 90,757 | 91,454 | 94,192 | → |
| Liscannor | Census Town | Clare | ... | ... | 108 | 71 | 129 | 113 | → |
| Liscarroll | Census Town | Cork | 284 | 279 | 256 | 256 | 230 | 249 | → |
| Lisdoonvarna | Census Town | Clare | 842 | 890 | 822 | 767 | 739 | 829 | → |
| Lismore | Agglomeration | Waterford | 1,095 | 1,095 | 1,182 | 1,240 | 1,369 | 1,374 | → |
| Lisronagh | Census Town | Tipperary | ... | ... | ... | ... | 187 | 184 | → |
| Lissycasey | Census Town | Clare | ... | ... | ... | ... | 308 | 325 | → |
| Listowel | Agglomeration | Kerry | 3,597 | 3,656 | 3,999 | 4,338 | 4,832 | 4,820 | → |
| Littleton | Census Town | Tipperary | 566 | 544 | 500 | 463 | 410 | 394 | → |
| Lixnaw | Census Town | Kerry | 260 | 263 | 248 | 431 | 634 | 696 | → |
| Loch an Iúir (Loughanure) | Census Town | Donegal | 286 | 262 | 312 | 307 | 337 | 313 | → |
| Longford | Agglomeration | Longford | 6,824 | 6,984 | 7,557 | 8,836 | 9,601 | 10,008 | → |
| Longwood | Census Town | Meath | ... | 186 | 480 | 877 | 1,378 | 1,581 | → |
| Lordship | Census Town | Louth | ... | ... | ... | ... | ... | 486 | → |
| Loughglinn | Census Town | Roscommon | 184 | 186 | 182 | 208 | 204 | 184 | → |
| Lough Gowna | Census Town | Cavan | ... | ... | ... | 123 | 161 | 149 | → |
| Loughrea | Town | Galway | 3,271 | 3,335 | 4,004 | 4,532 | 5,062 | 5,556 | → |
| Loughshinny | Census Town | Fingal | 606 | 614 | 663 | 641 | 670 | 666 | → |
| Louisburgh | Census Town | Mayo | 177 | 150 | 207 | 314 | 422 | 434 | → |
| Louth | Census Town | Louth | 373 | 401 | 514 | 549 | 715 | 735 | → |
| Lusk | Census Town | Fingal | 2,071 | 2,287 | 2,456 | 5,236 | 7,022 | 7,786 | → |
| Lyre | Census Town | Cork | ... | ... | ... | ... | 134 | 163 | → |
| Macroom | Agglomeration | Cork | 2,363 | 2,574 | 2,985 | 3,553 | 3,879 | 3,765 | → |
| Maddenstown | Census Town | Kildare | 215 | 189 | 179 | 154 | 145 | 133 | → |
| Maigh Cuilinn (Moycullen) | Census Town | Galway | 545 | 601 | 883 | 1,237 | 1,559 | 1,704 | → |
| Malahide | Census Town | Fingal | 12,088 | 13,539 | 13,826 | 14,937 | 15,846 | 16,550 | → |
| Malin | Census Town | Donegal | ... | ... | ... | 122 | 106 | 92 | → |
| Mallow | Agglomeration | Cork | 7,521 | 7,768 | 8,937 | 10,241 | 11,605 | 12,459 | → |
| Manorcunningham | Census Town | Donegal | 455 | 404 | 320 | 414 | 643 | 675 | → |
| Manorhamilton | Census Town | Leitrim | 995 | 1,008 | 927 | 1,158 | 1,336 | 1,466 | → |
| Manor Kilbride | Census Town | Wicklow | ... | ... | ... | ... | 281 | 272 | → |
| Maynooth | Census Town | Kildare | 6,027 | 8,528 | 10,151 | 10,715 | 12,510 | 14,585 | → |
| Meathas Truim (Edgeworthstown) | Census Town | Longford | 801 | 737 | 726 | 1,221 | 1,744 | 2,072 | → |
| Midleton | Agglomeration | Cork | 5,951 | 6,209 | 7,957 | 10,048 | 12,001 | 12,496 | → |
| Milford | Census Town | Cork | 256 | 208 | 204 | 176 | 251 | 247 | → |
| Milford | Census Town | Donegal | 864 | 816 | 793 | 829 | 970 | 1,037 | → |
| Millstreet | Census Town | Cork | 1,300 | 1,226 | 1,289 | 1,401 | 1,574 | 1,555 | → |
| Milltown | Census Town | Kerry | 341 | 332 | 332 | 415 | 838 | 928 | → |
| Milltown | Census Town | Kildare | 311 | 297 | 271 | 242 | 365 | 344 | → |
| Milltown | Census Town | Galway | ... | ... | ... | ... | 199 | 207 | → |
| Miltown Malbay | Census Town | Clare | 615 | 626 | 562 | 570 | 777 | 829 | → |
| Mín Lárach (Meenlaragh) | Census Town | Donegal | 465 | 440 | 430 | 372 | 442 | 420 | → |
| Mitchelstown | Census Town | Cork | 3,090 | 3,123 | 3,300 | 3,365 | 3,677 | 3,740 | → |
| Moate | Census Town | Westmeath | 1,529 | 1,452 | 1,520 | 1,888 | 2,731 | 2,763 | → |
| Model Village (Dripsey) | Census Town | Cork | 319 | 319 | 295 | 304 | 345 | 380 | → |
| Mogeely | Census Town | Cork | ... | ... | ... | ... | 327 | 389 | → |
| Mohill | Census Town | Leitrim | 796 | 808 | 786 | 931 | 928 | 855 | → |
| Monaghan | Agglomeration | Monaghan | 5,946 | 5,842 | 5,936 | 6,710 | 7,452 | 7,678 | → |
| Monard | Census Town | Tipperary | ... | ... | ... | ... | 205 | 212 | → |
| Monasterevin | Census Town | Kildare | 2,224 | 2,302 | 2,583 | 3,017 | 3,710 | 4,246 | → |
| Moneenroe | Census Town | Kilkenny | 640 | 655 | 678 | 688 | 761 | 722 | → |
| Moneygall | Census Town | Offaly | 344 | 332 | 291 | 298 | 310 | 313 | → |
| Monivea | Census Town | Galway | 310 | 298 | 300 | 337 | 296 | 308 | → |
| Mooncoin | Census Town | Kilkenny | 810 | 855 | 854 | 1,002 | 1,166 | 1,175 | → |
| Moroe | Census Town | Limerick | 419 | 435 | 464 | 624 | 1,271 | 1,377 | → |
| Mount Bellew | Census Town | Galway | 539 | 547 | 667 | 746 | 784 | 774 | → |
| Mountcharles | Census Town | Donegal | 413 | 428 | 432 | 497 | 468 | 484 | → |
| Mountcollins | Census Town | Limerick | 263 | 271 | 230 | 221 | 216 | 201 | → |
| Mountmellick | Agglomeration | Laois | 3,003 | 2,912 | 3,361 | 4,069 | 4,735 | 4,777 | → |
| Mountrath | Census Town | Laois | 1,375 | 1,298 | 1,331 | 1,435 | 1,661 | 1,774 | → |
| Mountshannon | Census Town | Clare | ... | ... | ... | 133 | 152 | 200 | → |
| Moville | Census Town | Donegal | 1,392 | 1,394 | 1,465 | 1,427 | 1,481 | 1,480 | → |
| Moylough | Census Town | Galway | 199 | 209 | 236 | 357 | 503 | 518 | → |
| Mucklagh | Census Town | Offaly | 374 | 342 | 521 | 708 | 810 | 826 | → |
| Muff | Census Town | Donegal | 257 | 334 | 773 | 947 | 1,271 | 1,226 | → |
| Muinebeag (Bagenalstown) | Agglomeration | Carlow | 2,700 | 2,695 | 2,728 | 2,735 | 2,950 | 2,837 | → |
| Mullagh | Census Town | Cavan | 426 | 403 | 479 | 679 | 1,137 | 1,348 | → |
| Mullaghmore | Census Town | Sligo | 124 | 164 | 137 | 147 | 128 | 136 | → |
| Mullinahone | Census Town | Tipperary | 379 | 358 | 348 | 372 | 481 | 499 | → |
| Mullinavat | Census Town | Kilkenny | 283 | 275 | 309 | 255 | 259 | 233 | → |
| Mullingar | Agglomeration | Westmeath | 11,867 | 12,492 | 15,621 | 18,416 | 20,103 | 20,928 | → |
| Mulranny | Census Town | Mayo | ... | ... | ... | ... | 242 | 289 | → |
| Multyfarnham | Census Town | Westmeath | ... | ... | 153 | 193 | 376 | 420 | → |
| Mungret | Census Town | Limerick | 307 | 292 | 248 | 252 | 286 | 277 | → |
| Murntown | Census Town | Wexford | 244 | 184 | 243 | 347 | 363 | 365 | → |
| Myshall | Census Town | Carlow | ... | ... | ... | 200 | 302 | 286 | → |
| Naas | Town | Kildare | 11,141 | 14,074 | 18,288 | 20,044 | 20,713 | 21,393 | → |
| Na Forbacha (Furbogh) | Census Town | Galway | ... | ... | 319 | 175 | 308 | 356 | → |
| Narraghmore | Census Town | Kildare | ... | ... | ... | ... | 345 | 378 | → |
| Naul | Census Town | Fingal | ... | ... | 215 | 196 | 445 | 568 | → |
| Navan (An Uaimh) | Agglomeration | Meath | 11,706 | 12,810 | 19,417 | 24,851 | 28,559 | 30,173 | → |
| Nenagh | Agglomeration | Tipperary | 5,825 | 5,913 | 6,454 | 7,751 | 8,439 | 8,968 | → |
| Newbawn | Census Town | Wexford | ... | ... | 169 | 204 | 184 | 177 | → |
| Newbliss | Census Town | Monaghan | 326 | 299 | 270 | 317 | 331 | 327 | → |
| Newcastle | Census Town | South Dublin | 1,200 | 1,289 | 1,160 | 1,506 | 2,659 | 3,093 | → |
| Newcastle | Census Town | Tipperary | 193 | 186 | 201 | 245 | 328 | 352 | → |
| Newcastle | Census Town | Wicklow | 633 | 763 | 851 | 837 | 951 | 924 | → |
| Newcastle West | Census Town | Limerick | 3,612 | 3,618 | 4,017 | 5,098 | 6,327 | 6,619 | → |
| Newmarket | Census Town | Cork | 1,097 | 1,150 | 1,055 | 949 | 988 | 976 | → |
| Newmarket-on-Fergus | Census Town | Clare | 1,583 | 1,542 | 1,496 | 1,542 | 1,773 | 1,784 | → |
| Newport | Census Town | Mayo | 521 | 567 | 527 | 590 | 616 | 626 | → |
| Newport | Census Town | Tipperary | 896 | 873 | 887 | 1,286 | 1,806 | 1,995 | → |
| New Ross | Agglomeration | Wexford / Kilkenny | 6,079 | 6,147 | 6,537 | 7,709 | 8,151 | 8,040 | → |
| Newtown (Newtownshandrum) | Census Town | Cork | 184 | 184 | 224 | 321 | 405 | 394 | → |
| Newtown | Census Town | Laois | 224 | 207 | 245 | 222 | 246 | 269 | → |
| Newtown | Census Town | Tipperary | ... | ... | ... | 191 | 296 | 309 | → |
| Newtowncunningham | Census Town | Donegal | 610 | 594 | 663 | 999 | 1,067 | 1,080 | → |
| Newtownforbes | Census Town | Longford | 429 | 470 | 561 | 668 | 759 | 778 | → |
| Newtownmountkennedy | Census Town | Wicklow | 2,321 | 2,528 | 2,521 | 2,548 | 2,410 | 2,835 | → |
| Newtownsandes | Census Town | Kerry | 365 | 370 | 326 | 387 | 401 | 381 | → |
| New Twopothouse | Census Town | Cork | ... | ... | ... | ... | ... | 120 | → |
| Nobber | Census Town | Meath | 253 | 242 | 245 | 233 | 357 | 344 | → |
| Nurney | Census Town | Kildare | ... | ... | 239 | 354 | 389 | 456 | → |
| O'Briensbridge - Montpelier | Census Town | Clare / Limerick | 380 | 409 | 375 | 378 | 383 | 396 | → |
| Oilgate (Oylegate) | Census Town | Wexford | 262 | 262 | 265 | 324 | 385 | 358 | → |
| Oldcastle | Census Town | Meath | 847 | 826 | 937 | 1,316 | 1,384 | 1,383 | → |
| Oldtown | Census Town | Fingal | ... | ... | 162 | 220 | 455 | 497 | → |
| Omeath | Census Town | Louth | 249 | 249 | 231 | 439 | 503 | 603 | → |
| Oola | Census Town | Limerick | 474 | 444 | 391 | 386 | 311 | 324 | → |
| Oram | Census Town | Monaghan | ... | ... | ... | ... | 145 | 186 | → |
| Oranmore | Census Town | Galway | 1,192 | 1,410 | 1,692 | 3,513 | 4,799 | 4,990 | → |
| Oughterard | Census Town | Galway | 711 | 751 | 1,209 | 1,305 | 1,333 | 1,318 | → |
| Oulart | Census Town | Wexford | ... | ... | ... | 197 | 257 | 274 | → |
| Palatine | Census Town | Carlow | ... | ... | ... | ... | 351 | 398 | → |
| Pallas Grean | Census Town | Limerick | 318 | 303 | 368 | 359 | 589 | 568 | → |
| Pallaskenry | Census Town | Limerick | 469 | 519 | 550 | 534 | 664 | 651 | → |
| Passage East | Census Town | Waterford | 542 | 573 | 636 | 644 | 806 | 827 | → |
| Passage West | Agglomeration | Cork | 3,606 | 3,922 | 4,595 | 5,203 | 5,790 | 5,843 | → |
| Patrickswell | Census Town | Limerick | 1,019 | 1,022 | 998 | 924 | 841 | 847 | → |
| Paulstown | Census Town | Kilkenny | 234 | 221 | 292 | 598 | 791 | 905 | → |
| Pettigo (Irish part) | Census Town | Donegal | 370 | 320 | 275 | 280 | 239 | 239 | → |
| Piercetown | Census Town | Wexford | 256 | 309 | 471 | 528 | 555 | 535 | → |
| Piltown | Census Town | Kilkenny | 717 | 716 | 778 | 968 | 1,187 | 1,220 | → |
| Pollagh | Census Town | Offaly | ... | ... | ... | 229 | 251 | 227 | → |
| Portarlington | Census Town | Laois / Offaly | 3,211 | 3,320 | 4,001 | 6,004 | 7,788 | 8,368 | → |
| Portlaoise (Maryborough) | Agglomeration | Laois | 8,360 | 9,474 | 12,127 | 14,613 | 20,145 | 22,050 | → |
| Portlaw | Census Town | Waterford | 1,151 | 1,176 | 1,183 | 1,495 | 1,696 | 1,742 | → |
| Portmagee | Census Town | Kerry | ... | ... | ... | ... | 109 | 123 | → |
| Portmarnock | Census Town | Fingal | 9,173 | 9,145 | 8,376 | 8,979 | 9,285 | 9,466 | → |
| Portrane | Census Town | Fingal | 2,153 | 1,924 | 1,726 | 1,532 | 1,372 | 1,236 | → |
| Portroe | Census Town | Tipperary | 314 | 411 | 401 | 454 | 468 | 461 | → |
| Portumna | Census Town | Galway | 1,017 | 984 | 1,235 | 1,377 | 1,530 | 1,450 | → |
| Prosperous | Census Town | Kildare | 882 | 814 | 1,523 | 1,939 | 2,248 | 2,333 | → |
| Puckaun | Census Town | Tipperary | 256 | 235 | 269 | 239 | 273 | 250 | → |
| Quigleys Point | Census Town | Donegal | ... | ... | ... | ... | 227 | 199 | → |
| Quilty | Census Town | Clare | 274 | 259 | 234 | 194 | 181 | 173 | → |
| Quin | Census Town | Clare | 245 | 242 | 427 | 565 | 935 | 951 | → |
| Raharney | Census Town | Westmeath | 254 | 232 | 232 | 231 | 227 | 221 | → |
| Ramelton | Census Town | Donegal | 920 | 978 | 1,051 | 1,088 | 1,212 | 1,266 | → |
| Rann na Feirste | Census Town | Donegal | 321 | 299 | 279 | 319 | 352 | 309 | → |
| Raphoe | Census Town | Donegal | 1,090 | 1,065 | 949 | 1,065 | 1,157 | 1,089 | → |
| Rathangan | Census Town | Kildare | 1,129 | 1,190 | 1,811 | 1,718 | 2,374 | 2,611 | → |
| Rathard - Aherla | Census Town | Cork | ... | ... | 172 | 389 | 560 | 571 | → |
| Rathcoffey | Census Town | Kildare | ... | ... | ... | ... | ... | 271 | → |
| Rathcoole | Census Town | South Dublin | 2,926 | 2,784 | 2,499 | 2,927 | 3,421 | 4,351 | → |
| Rathcoole | Census Town | Cork | ... | ... | ... | ... | 198 | 224 | → |
| Rathcormac | Census Town | Cork | 365 | 382 | 429 | 1,072 | 1,534 | 1,762 | → |
| Rathdowney | Census Town | Laois | 1,092 | 1,066 | 1,111 | 1,212 | 1,208 | 1,271 | → |
| Rathdrum | Census Town | Wicklow | 1,175 | 1,234 | 1,387 | 1,405 | 1,586 | 1,663 | → |
| Rathkeale | Census Town | Limerick | 1,803 | 1,546 | 1,362 | 1,494 | 1,550 | 1,441 | → |
| Rathluirc (Charleville) | Census Town | Cork | 2,646 | 2,667 | 2,685 | 2,984 | 3,672 | 3,919 | → |
| Rathmolyon | Census Town | Meath | 211 | 206 | 194 | 168 | 298 | 334 | → |
| Rathmore | Census Town | Kerry | 505 | 470 | 450 | 611 | 778 | 790 | → |
| Rathmullen | Census Town | Donegal | 536 | 491 | 514 | 469 | 518 | 493 | → |
| Rathnew | Census Town | Wicklow | 1,496 | 1,437 | 1,441 | 1,849 | 2,964 | 3,370 | → |
| Rathowen | Census Town | Westmeath | ... | ... | ... | ... | ... | 150 | → |
| Rathtoe | Census Town | Carlow | ... | ... | ... | ... | 303 | 304 | → |
| Rathvilly | Census Town | Carlow | 531 | 458 | 500 | 796 | 881 | 944 | → |
| Ratoath | Census Town | Meath | 593 | 1,061 | 3,794 | 7,249 | 9,043 | 9,533 | → |
| Reardnogy | Census Town | Tipperary | ... | ... | 159 | 137 | 176 | 156 | → |
| Redcross | Census Town | Wicklow | ... | ... | ... | 196 | 241 | 278 | → |
| Rhode | Census Town | Offaly | 500 | 476 | 705 | 778 | 778 | 811 | → |
| Ringaskiddy - Loughbeg | Census Town | Cork | 545 | 429 | 407 | 514 | 478 | 580 | → |
| Rivermeade | Census Town | Fingal | 660 | 621 | 558 | 615 | 543 | 530 | → |
| Riverstick | Census Town | Cork | ... | ... | ... | ... | 592 | 590 | → |
| Riverstown | Census Town | Sligo | 274 | 266 | 273 | 310 | 374 | 334 | → |
| Robertstown | Census Town | Kildare | 235 | 206 | 375 | 621 | 669 | 707 | → |
| Rochfortbridge | Census Town | Westmeath | 721 | 724 | 1,382 | 1,473 | 1,494 | 1,473 | → |
| Rockcorry | Census Town | Monaghan | 278 | 260 | 287 | 292 | 310 | 316 | → |
| Roosky | Census Town | Leitrim / Roscommon | 249 | 220 | 198 | 329 | 523 | 564 | → |
| Roscommon | Census Town | Roscommon | 3,427 | 3,915 | 4,489 | 5,017 | 5,693 | 5,876 | → |
| Roscrea | Census Town | Tipperary | 4,231 | 4,170 | 4,578 | 4,910 | 5,403 | 5,446 | → |
| Rosegreen | Census Town | Tipperary | ... | ... | ... | 201 | 170 | 171 | → |
| Rosscahill | Census Town | Galway | ... | ... | ... | 240 | 295 | 306 | → |
| Rosscarbery | Census Town | Cork | 455 | 406 | 437 | 507 | 534 | 490 | → |
| Rosses Point | Census Town | Sligo | 707 | 799 | 774 | 872 | 824 | 883 | → |
| Rosslare | Census Town | Wexford | 847 | 929 | 1,145 | 1,359 | 1,547 | 1,620 | → |
| Roundstone | Census Town | Galway | 281 | 241 | 239 | 207 | 245 | 214 | → |
| Roundwood | Census Town | Wicklow | 437 | 446 | 518 | 589 | 833 | 948 | → |
| Rush | Census Town | Fingal | 4,839 | 5,429 | 6,769 | 8,286 | 9,231 | 9,943 | → |
| Saggart | Census Town | South Dublin | 603 | 550 | 588 | 868 | 2,144 | 3,133 | → |
| Saleen | Census Town | Cork | ... | ... | ... | ... | 374 | 445 | → |
| Sallins | Census Town | Kildare | 783 | 854 | 2,922 | 3,806 | 5,283 | 5,849 | → |
| Scarriff - Tuamgraney | Census Town | Clare | 789 | 763 | 807 | 798 | 816 | 770 | → |
| Schull | Census Town | Cork | 579 | 595 | 693 | 576 | 658 | 700 | → |
| Scotshouse | Census Town | Monaghan | ... | ... | ... | ... | ... | 220 | → |
| Scotstown | Census Town | Monaghan | 244 | 234 | 220 | 250 | 370 | 361 | → |
| Shanagarry | Census Town | Cork | 242 | 230 | 291 | 297 | 414 | 538 | → |
| Shanagolden | Census Town | Limerick | 416 | 412 | 373 | 292 | 294 | 303 | → |
| Shanbally | Census Town | Cork | ... | ... | ... | ... | 337 | 349 | → |
| Shanballymore | Census Town | Cork | ... | ... | ... | ... | 160 | 165 | → |
| Shannon | Town | Clare | 7,920 | 7,939 | 8,561 | 9,222 | 9,673 | 9,729 | → |
| Shannonbridge | Census Town | Offaly | 312 | 266 | 248 | 221 | 206 | 175 | → |
| Shercock | Census Town | Cavan | 371 | 380 | 454 | 461 | 531 | 588 | → |
| Shillelagh | Census Town | Wicklow | 326 | 324 | 278 | 311 | 341 | 337 | → |
| Shinrone | Census Town | Offaly | 455 | 479 | 488 | 591 | 634 | 645 | → |
| Shrule | Census Town | Mayo | 246 | 337 | 326 | 425 | 418 | 432 | → |
| Silvermines | Census Town | Tipperary | 209 | 202 | 257 | 269 | 288 | 310 | → |
| Sixmilebridge | Census Town | Clare | 1,191 | 1,144 | 1,327 | 1,659 | 2,507 | 2,625 | → |
| Skerries | Census Town | Fingal | 7,032 | 7,339 | 9,149 | 9,535 | 9,671 | 10,043 | → |
| Skibbereen | Agglomeration | Cork | 1,892 | 1,926 | 2,000 | 2,338 | 2,670 | 2,778 | → |
| Slane | Census Town | Meath | 699 | 688 | 823 | 1,099 | 1,349 | 1,369 | → |
| Slieverue | Census Town | Kilkenny | 275 | 296 | 461 | 484 | 499 | 476 | → |
| Sligo | Agglomeration | Sligo | 17,964 | 18,509 | 19,735 | 19,402 | 19,452 | 19,199 | → |
| Smithborough | Census Town | Monaghan | 236 | 232 | 240 | 309 | 363 | 395 | → |
| Sneem | Census Town | Kerry | 292 | 296 | 285 | 279 | 258 | 288 | → |
| Spa | Census Town | Kerry | 398 | 394 | 424 | 417 | 460 | 443 | → |
| Stamullen | Census Town | Meath | 396 | 427 | 779 | 2,487 | 3,130 | 3,361 | → |
| St. Johnston | Census Town | Donegal | 442 | 453 | 470 | 479 | 583 | 523 | → |
| Stradbally | Census Town | Laois | 1,046 | 1,047 | 1,178 | 1,056 | 1,154 | 1,350 | → |
| Stradbally | Census Town | Waterford | 251 | 262 | 298 | 391 | 420 | 438 | → |
| Straffan | Census Town | Kildare | 341 | 341 | 332 | 439 | 635 | 853 | → |
| Strandhill | Census Town | Sligo | 654 | 764 | 1,002 | 1,413 | 1,596 | 1,753 | → |
| Stratford (Stratford-on-Slaney) | Census Town | Wicklow | ... | ... | 151 | 163 | 217 | 241 | → |
| Strokestown | Census Town | Roscommon | 568 | 572 | 631 | 773 | 814 | 825 | → |
| Summerhill | Census Town | Meath | 368 | 502 | 668 | 799 | 832 | 878 | → |
| Suncroft | Census Town | Kildare | 520 | 490 | 498 | 607 | 735 | 746 | → |
| Swanlinbar | Census Town | Cavan | 188 | 191 | 223 | 266 | 211 | 207 | → |
| Swinford | Census Town | Mayo | 1,216 | 1,386 | 1,497 | 1,502 | 1,435 | 1,394 | → |
| Swords | Census Town | Fingal | 17,705 | 22,314 | 27,175 | 33,998 | 36,924 | 39,248 | → |
| Taghmon | Census Town | Wexford | 676 | 619 | 625 | 674 | 623 | 585 | → |
| Tallanstown | Census Town | Louth | 439 | 408 | 443 | 653 | 673 | 674 | → |
| Tallow | Census Town | Waterford | 858 | 802 | 845 | 911 | 962 | 946 | → |
| Tarbert | Census Town | Kerry | 679 | 605 | 548 | 550 | 551 | 540 | → |
| Templemore | Agglomeration | Tipperary | 2,325 | 2,244 | 2,270 | 2,384 | 2,071 | 1,939 | → |
| Templetuohy | Census Town | Tipperary | 238 | 293 | 325 | 322 | 323 | 282 | → |
| Termonbarry (Tarmonbarry) | Census Town | Roscommon | ... | ... | ... | ... | ... | 443 | → |
| Termonfeckin | Census Town | Louth | 589 | 530 | 503 | 653 | 1,443 | 1,579 | → |
| The Ballagh | Census Town | Wexford | ... | ... | ... | ... | 477 | 515 | → |
| The Commons | Census Town | Tipperary | ... | ... | ... | ... | 152 | 150 | → |
| The Swan | Census Town | Laois | ... | ... | ... | ... | 213 | 216 | → |
| Thomastown | Census Town | Kilkenny | 1,487 | 1,581 | 1,600 | 1,837 | 2,273 | 2,445 | → |
| Thurles | Agglomeration | Tipperary | 6,955 | 6,939 | 7,425 | 7,682 | 7,933 | 7,940 | → |
| Tievebane | Census Town | Donegal | 212 | 236 | 267 | 235 | 351 | 345 | → |
| Timoleague | Census Town | Cork | 304 | 285 | 323 | 365 | 373 | 381 | → |
| Tinahely | Census Town | Wicklow | 628 | 630 | 692 | 965 | 970 | 937 | → |
| Tinriland (Tinryland) | Census Town | Carlow | 326 | 331 | 371 | 243 | 418 | 378 | → |
| Tinure | Census Town | Louth | ... | ... | 296 | 387 | 456 | 464 | → |
| Tipperary | Agglomeration | Tipperary | 4,963 | 4,854 | 4,964 | 5,065 | 5,310 | 4,979 | → |
| Toomevara | Census Town | Tipperary | 411 | 362 | 321 | 286 | 311 | 280 | → |
| Toornafulla | Census Town | Limerick | ... | ... | ... | ... | 152 | 144 | → |
| Tower | Census Town | Cork City | 1,402 | 1,841 | 3,032 | 3,102 | 3,306 | 3,421 | → |
| Tralee | Agglomeration | Kerry | 17,862 | 19,950 | 21,987 | 22,744 | 23,693 | 23,691 | → |
| Tramore | Agglomeration | Waterford | 6,064 | 6,536 | 8,305 | 9,634 | 10,328 | 10,381 | → |
| Trim | Agglomeration | Meath | 4,185 | 4,405 | 5,894 | 6,870 | 8,268 | 9,194 | → |
| Tuam | Agglomeration | Galway | 5,540 | 5,627 | 5,947 | 6,885 | 8,242 | 8,767 | → |
| Tubbercurry | Census Town | Sligo | 1,069 | 1,089 | 1,171 | 1,421 | 1,747 | 1,986 | → |
| Tulla | Census Town | Clare | 398 | 382 | 414 | 645 | 662 | 661 | → |
| Tullaghan | Census Town | Leitrim | ... | ... | ... | 216 | 228 | 253 | → |
| Tullamore | Agglomeration | Offaly | 9,430 | 10,039 | 11,098 | 12,927 | 14,361 | 14,607 | → |
| Tullow | Census Town | Carlow | 2,424 | 2,364 | 2,417 | 3,048 | 3,972 | 4,673 | → |
| Tullyallen | Census Town | Louth | 393 | 429 | 617 | 1,036 | 1,358 | 1,547 | → |
| Tulsk | Census Town | Roscommon | ... | ... | ... | ... | 195 | 241 | → |
| Turlough | Census Town | Mayo | ... | ... | ... | ... | 272 | 299 | → |
| Turloughmore | Census Town | Galway | ... | ... | ... | ... | ... | 240 | → |
| Twomileborris | Census Town | Tipperary | 298 | 325 | 474 | 550 | 548 | 572 | → |
| Tyrrellspass | Census Town | Westmeath | 376 | 396 | 443 | 493 | 506 | 483 | → |
| Unionhall | Census Town | Cork | 202 | 206 | 202 | 192 | 252 | 270 | → |
| Urlingford | Census Town | Kilkenny | 689 | 689 | 739 | 867 | 973 | 1,038 | → |
| Villierstown | Census Town | Waterford | ... | ... | 192 | 260 | 279 | 276 | → |
| Virginia | Census Town | Cavan | 720 | 811 | 1,093 | 1,734 | 2,282 | 2,648 | → |
| Waterford | Agglomeration | Waterford / Kilkenny | 41,853 | 44,155 | 46,736 | 49,213 | 51,519 | 53,504 | → |
| Watergrasshill | Census Town | Cork | 250 | 252 | 386 | 860 | 1,161 | 1,346 | → |
| Waterville - Spunkane | Census Town | Kerry | 463 | 466 | 538 | 546 | 465 | 462 | → |
| Westport | Agglomeration | Mayo | 3,688 | 4,520 | 5,634 | 5,475 | 6,063 | 6,198 | → |
| Wexford | Agglomeration | Wexford | 15,393 | 15,862 | 17,235 | 18,163 | 20,072 | 20,188 | → |
| Whitechurch | Census Town | Cork | ... | ... | ... | 408 | 573 | 665 | → |
| Whitegate | Census Town | Cork | 289 | 293 | 440 | 765 | 1,067 | 1,154 | → |
| Whitegate | Census Town | Clare | 193 | 200 | 193 | 218 | 176 | 168 | → |
| Wicklow | Agglomeration | Wicklow | 6,215 | 7,290 | 9,355 | 10,070 | 10,356 | 10,584 | → |
| Williamstown | Census Town | Galway | ... | ... | ... | ... | 155 | 148 | → |
| Woodford | Census Town | Galway | 265 | 298 | 280 | 301 | 282 | 239 | → |
| Youghal | Agglomeration | Cork | 5,828 | 5,943 | 6,597 | 6,785 | 7,794 | 7,963 | → |
Source: Central Statistics Office, Ireland (web).