All counties in the State of Iowa.
| Name | Status | Population (C 1990-04-01) | Population (C 2000-04-01) |
|---|---|---|---|
| Adair | County | 8,409 | 8,243 |
| Adams | County | 4,866 | 4,482 |
| Allamakee | County | 13,855 | 14,675 |
| Appanoose | County | 13,743 | 13,721 |
| Audubon | County | 7,334 | 6,830 |
| Benton | County | 22,429 | 25,308 |
| Black Hawk | County | 123,798 | 128,012 |
| Boone | County | 25,186 | 26,224 |
| Bremer | County | 22,813 | 23,325 |
| Buchanan | County | 20,844 | 21,093 |
| Buena Vista | County | 19,965 | 20,411 |
| Butler | County | 15,731 | 15,305 |
| Calhoun | County | 11,508 | 11,115 |
| Carroll | County | 21,423 | 21,421 |
| Cass | County | 15,128 | 14,684 |
| Cedar | County | 17,444 | 18,187 |
| Cerro Gordo | County | 46,733 | 46,447 |
| Cherokee | County | 14,098 | 13,035 |
| Chickasaw | County | 13,295 | 13,095 |
| Clarke | County | 8,287 | 9,133 |
| Clay | County | 17,585 | 17,372 |
| Clayton | County | 19,054 | 18,678 |
| Clinton | County | 51,040 | 50,149 |
| Crawford | County | 16,775 | 16,942 |
| Dallas | County | 29,755 | 40,750 |
| Davis | County | 8,312 | 8,541 |
| Decatur | County | 8,338 | 8,689 |
| Delaware | County | 18,035 | 18,404 |
| Des Moines | County | 42,614 | 42,351 |
| Dickinson | County | 14,909 | 16,424 |
| Dubuque | County | 86,403 | 89,143 |
| Emmet | County | 11,569 | 11,027 |
| Fayette | County | 21,843 | 22,008 |
| Floyd | County | 17,058 | 16,900 |
| Franklin | County | 11,364 | 10,704 |
| Fremont | County | 8,226 | 8,010 |
| Greene | County | 10,045 | 10,366 |
| Grundy | County | 12,029 | 12,369 |
| Guthrie | County | 10,935 | 11,353 |
| Hamilton | County | 16,071 | 16,438 |
| Hancock | County | 12,638 | 12,100 |
| Hardin | County | 19,094 | 18,812 |
| Harrison | County | 14,730 | 15,666 |
| Henry | County | 19,226 | 20,336 |
| Howard | County | 9,809 | 9,932 |
| Humboldt | County | 10,756 | 10,381 |
| Ida | County | 8,365 | 7,837 |
| Iowa | County | 14,630 | 15,671 |
| Jackson | County | 19,950 | 20,296 |
| Jasper | County | 34,795 | 37,213 |
| Jefferson | County | 16,310 | 16,181 |
| Johnson | County | 96,119 | 111,006 |
| Jones | County | 19,444 | 20,221 |
| Keokuk | County | 11,624 | 11,400 |
| Kossuth | County | 18,591 | 17,163 |
| Lee | County | 38,687 | 38,052 |
| Linn | County | 168,767 | 191,701 |
| Louisa | County | 11,592 | 12,183 |
| Lucas | County | 9,070 | 9,422 |
| Lyon | County | 11,952 | 11,763 |
| Madison | County | 12,483 | 14,019 |
| Mahaska | County | 21,532 | 22,335 |
| Marion | County | 30,001 | 32,052 |
| Marshall | County | 38,276 | 39,311 |
| Mills | County | 13,202 | 14,547 |
| Mitchell | County | 10,928 | 10,874 |
| Monona | County | 10,034 | 10,020 |
| Monroe | County | 8,114 | 8,016 |
| Montgomery | County | 12,076 | 11,771 |
| Muscatine | County | 39,907 | 41,722 |
| O'Brien | County | 15,444 | 15,102 |
| Osceola | County | 7,267 | 7,003 |
| Page | County | 16,870 | 16,976 |
| Palo Alto | County | 10,669 | 10,147 |
| Plymouth | County | 23,388 | 24,849 |
| Pocahontas | County | 9,525 | 8,662 |
| Polk | County | 327,140 | 374,601 |
| Pottawattamie | County | 82,628 | 87,704 |
| Poweshiek | County | 19,033 | 18,815 |
| Ringgold | County | 5,420 | 5,469 |
| Sac | County | 12,324 | 11,529 |
| Scott | County | 150,973 | 158,668 |
| Shelby | County | 13,230 | 13,173 |
| Sioux | County | 29,903 | 31,589 |
| Story | County | 74,252 | 79,981 |
| Tama | County | 17,419 | 18,103 |
| Taylor | County | 7,114 | 6,958 |
| Union | County | 12,750 | 12,309 |
| Van Buren | County | 7,676 | 7,809 |
| Wapello | County | 35,696 | 36,051 |
| Warren | County | 36,033 | 40,671 |
| Washington | County | 19,612 | 20,670 |
| Wayne | County | 7,067 | 6,730 |
| Webster | County | 40,342 | 40,235 |
| Winnebago | County | 12,122 | 11,723 |
| Winneshiek | County | 20,847 | 21,310 |
| Woodbury | County | 98,276 | 103,877 |
| Worth | County | 7,991 | 7,909 |
| Wright | County | 14,269 | 14,334 |
| Iowa | Federal State | 2,776,831 | 2,926,324 |
Contents: All places in the State of Iowa.
| Name | Status | County | Population (C 1990-04-01) | Population (C 2000-04-01) |
|---|---|---|---|---|
| Ackley | City | 1,719 | 1,809 | |
| Ackworth | City | Warren | 68 | 85 |
| Adair | City | 894 | 839 | |
| Adel | City | Dallas | 3,401 | 3,435 |
| Afton | City | Union | 958 | 917 |
| Agency | City | Wapello | 660 | 622 |
| Ainsworth | City | Washington | 506 | 524 |
| Akron | City | Plymouth | 1,469 | 1,489 |
| Albert City | City | Buena Vista | 781 | 709 |
| Albia | City | Monroe | 4,060 | 3,706 |
| Albion | City | Marshall | 585 | 592 |
| Alburnett | City | Linn | 462 | 559 |
| Alden | City | Hardin | 860 | 904 |
| Alexander | City | Franklin | 172 | 165 |
| Algona | City | Kossuth | 6,200 | 5,741 |
| Alleman | City | Polk | 362 | 439 |
| Allerton | City | Wayne | 609 | 559 |
| Allison | City | Butler | 948 | 1,006 |
| Alta | City | Buena Vista | 1,854 | 1,865 |
| Alta Vista | City | Chickasaw | 250 | 286 |
| Alton | City | Sioux | 1,138 | 1,095 |
| Altoona | City | Polk | 7,390 | 10,345 |
| Alvord | City | Lyon | 194 | 187 |
| Ames | City | Story | 47,362 | 50,731 |
| Anamosa | City | Jones | 5,108 | 5,494 |
| Andover | City | Clinton | 99 | 87 |
| Andrew | City | Jackson | 312 | 460 |
| Anita | City | Cass | 1,089 | 1,049 |
| Ankeny | City | Polk | 18,590 | 27,117 |
| Anthon | City | Woodbury | 625 | 649 |
| Aplington | City | Butler | 1,135 | 1,054 |
| Arcadia | City | Carroll | 485 | 443 |
| Archer | City | O'Brien | 148 | 126 |
| Aredale | City | Butler | 93 | 89 |
| Arion | City | Crawford | 148 | 136 |
| Arispe | City | Union | 92 | 89 |
| Arlington | City | Fayette | 483 | 490 |
| Armstrong | City | Emmet | 1,006 | 979 |
| Arnolds Park | City | Dickinson | 987 | 1,162 |
| Arthur | City | Ida | 272 | 245 |
| Asbury | City | Dubuque | 2,072 | 2,450 |
| Ashton | City | Osceola | 462 | 461 |
| Aspinwall | City | Crawford | 50 | 58 |
| Atalissa | City | Muscatine | 357 | 283 |
| Athelstan | City | Taylor | 28 | 18 |
| Atkins | City | Benton | 732 | 977 |
| Atlantic | City | Cass | 7,523 | 7,257 |
| Auburn | City | Sac | 304 | 296 |
| Audubon | City | Audubon | 2,559 | 2,382 |
| Aurelia | City | Cherokee | 1,034 | 1,062 |
| Aurora | City | Buchanan | 203 | 194 |
| Avoca | City | Pottawattamie | 1,512 | 1,610 |
| Ayrshire | City | Palo Alto | 195 | 202 |
| Badger | City | Webster | 600 | 610 |
| Bagley | City | Guthrie | 319 | 354 |
| Baldwin | City | Jackson | 137 | 127 |
| Balltown | City | Dubuque | 76 | 73 |
| Bancroft | City | Kossuth | 852 | 808 |
| Bankston | City | Dubuque | 29 | 27 |
| Barnes City | City | 221 | 201 | |
| Barnum | City | Webster | 160 | 195 |
| Bassett | City | Chickasaw | 80 | 74 |
| Batavia | City | Jefferson | 535 | 500 |
| Battle Creek | City | Ida | 825 | 743 |
| Baxter | City | Jasper | 922 | 1,052 |
| Bayard | City | Guthrie | 506 | 536 |
| Beacon | City | Mahaska | 493 | 518 |
| Beaconsfield | City | Ringgold | 27 | 11 |
| Beaman | City | Grundy | 183 | 210 |
| Beaver | City | Boone | 46 | 53 |
| Bedford | City | Taylor | 1,735 | 1,620 |
| Belle Plaine | City | Benton | 2,836 | 2,878 |
| Bellevue | City | Jackson | 2,286 | 2,350 |
| Belmond | City | Wright | 2,510 | 2,560 |
| Bennett | City | Cedar | 425 | 395 |
| Benton | City | Ringgold | 41 | 40 |
| Berkley | City | Boone | 36 | 24 |
| Bernard | City | Dubuque | 96 | 97 |
| Bertram | City | Linn | 218 | 681 |
| Bettendorf | City | Scott | 27,844 | 31,275 |
| Bevington | City | 53 | 58 | |
| Birmingham | City | Van Buren | 386 | 423 |
| Blairsburg | City | Hamilton | 269 | 235 |
| Blairstown | City | Benton | 677 | 682 |
| Blakesburg | City | Wapello | 302 | 374 |
| Blanchard | City | Page | 56 | 61 |
| Blencoe | City | Monona | 258 | 231 |
| Blockton | City | Taylor | 175 | 192 |
| Bloomfield | City | Davis | 2,623 | 2,601 |
| Blue Grass | City | Scott | 1,212 | 1,169 |
| Bode | City | Humboldt | 355 | 327 |
| Bonaparte | City | Van Buren | 482 | 458 |
| Bondurant | City | Polk | 1,604 | 1,846 |
| Boone | City | Boone | 12,442 | 12,803 |
| Bouton | City | Dallas | 149 | 136 |
| Boxholm | City | Boone | 214 | 215 |
| Boyden | City | Sioux | 655 | 672 |
| Braddyville | City | Page | 204 | 176 |
| Bradgate | City | Humboldt | 121 | 101 |
| Brandon | City | Buchanan | 322 | 311 |
| Brayton | City | Audubon | 118 | 145 |
| Breda | City | Carroll | 467 | 477 |
| Bridgewater | City | Adair | 171 | 178 |
| Brighton | City | Washington | 684 | 687 |
| Bristow | City | Butler | 197 | 202 |
| Britt | City | Hancock | 2,215 | 2,052 |
| Bronson | City | Woodbury | 210 | 269 |
| Brooklyn | City | Poweshiek | 1,440 | 1,367 |
| Brunsville | City | Plymouth | 137 | 146 |
| Buck Grove | City | Crawford | 66 | 49 |
| Buckeye | City | Hardin | 105 | 110 |
| Buffalo | City | Scott | 1,295 | 1,321 |
| Buffalo Center | City | Winnebago | 1,086 | 963 |
| Burlington | City | Des Moines | 27,439 | 26,839 |
| Burt | City | Kossuth | 591 | 556 |
| Bussey | City | Marion | 507 | 450 |
| Calamus | City | Clinton | 379 | 394 |
| Callender | City | Webster | 396 | 424 |
| Calmar | City | Winneshiek | 1,025 | 1,058 |
| Calumet | City | O'Brien | 160 | 181 |
| Camanche | City | Clinton | 4,488 | 4,215 |
| Cambridge | City | Story | 702 | 819 |
| Cantril | City | Van Buren | 271 | 257 |
| Carbon | City | Adams | 60 | 28 |
| Carlisle | City | 3,286 | 3,497 | |
| Carpenter | City | Mitchell | 99 | 130 |
| Carroll | City | Carroll | 9,687 | 10,106 |
| Carson | City | Pottawattamie | 753 | 668 |
| Carter Lake | City | Pottawattamie | 3,197 | 3,248 |
| Cascade | City | 1,796 | 1,958 | |
| Casey | City | 434 | 478 | |
| Castalia | City | Winneshiek | 181 | 175 |
| Castana | City | Monona | 159 | 178 |
| Cedar Falls | City | Black Hawk | 33,857 | 36,145 |
| Cedar Rapids | City | Linn | 108,854 | 120,758 |
| Center Junction | City | Jones | 166 | 131 |
| Center Point | City | Linn | 1,711 | 2,007 |
| Centerville | City | Appanoose | 6,071 | 5,924 |
| Central City | City | Linn | 1,085 | 1,157 |
| Centralia | City | Dubuque | 118 | 101 |
| Chariton | City | Lucas | 4,667 | 4,573 |
| Charles City | City | Floyd | 7,969 | 7,812 |
| Charlotte | City | Clinton | 338 | 421 |
| Charter Oak | City | Crawford | 506 | 530 |
| Chatsworth | City | Sioux | 103 | 89 |
| Chelsea | City | Tama | 355 | 287 |
| Cherokee | City | Cherokee | 6,046 | 5,369 |
| Chester | City | Howard | 172 | 151 |
| Chillicothe | City | Wapello | 160 | 90 |
| Churdan | City | Greene | 430 | 418 |
| Cincinnati | City | Appanoose | 363 | 428 |
| Clare | City | Webster | 169 | 190 |
| Clarence | City | Cedar | 936 | 1,008 |
| Clarinda | City | Page | 5,140 | 5,690 |
| Clarion | City | Wright | 2,717 | 2,968 |
| Clarksville | City | Butler | 1,377 | 1,441 |
| Clayton | City | Clayton | 46 | 55 |
| Clear Lake | City | Cerro Gordo | 8,606 | 8,161 |
| Clearfield | City | 373 | 371 | |
| Cleghorn | City | Cherokee | 275 | 250 |
| Clemons | City | Marshall | 173 | 148 |
| Clermont | City | Fayette | 734 | 716 |
| Clinton | City | Clinton | 29,537 | 27,772 |
| Clio | City | Wayne | 103 | 91 |
| Clive | City | 7,515 | 12,855 | |
| Clutier | City | Tama | 202 | 229 |
| Coalville | Census-Designated Place | Webster | ... | 591 |
| Coburg | City | Montgomery | 72 | 31 |
| Coggon | City | Linn | 653 | 745 |
| Coin | City | Page | 213 | 252 |
| Colesburg | City | Delaware | 413 | 412 |
| Colfax | City | Jasper | 2,518 | 2,223 |
| College Springs | City | Page | 230 | 246 |
| Collins | City | Story | 467 | 499 |
| Colo | City | Story | 795 | 868 |
| Columbus City | City | Louisa | 336 | 376 |
| Columbus Junction | City | Louisa | 1,724 | 1,900 |
| Colwell | City | Floyd | 94 | 76 |
| Conesville | City | Muscatine | 337 | 424 |
| Conrad | City | Grundy | 969 | 1,055 |
| Conway | City | Taylor | 51 | 63 |
| Coon Rapids | City | 1,329 | 1,305 | |
| Coppock | City | 50 | 57 | |
| Coralville | City | Johnson | 10,682 | 15,123 |
| Corning | City | Adams | 1,838 | 1,783 |
| Correctionville | City | Woodbury | 920 | 851 |
| Corwith | City | Hancock | 354 | 350 |
| Corydon | City | Wayne | 1,705 | 1,591 |
| Cotter | City | Louisa | 50 | 48 |
| Coulter | City | Franklin | 263 | 262 |
| Council Bluffs | City | Pottawattamie | 54,773 | 58,268 |
| Craig | City | Plymouth | 116 | 102 |
| Crawfordsville | City | Washington | 298 | 295 |
| Crescent | City | Pottawattamie | 488 | 537 |
| Cresco | City | Howard | 3,687 | 3,905 |
| Creston | City | Union | 7,932 | 7,597 |
| Cromwell | City | Union | 120 | 120 |
| Crystal Lake | City | Hancock | 241 | 285 |
| Cumberland | City | Cass | 295 | 281 |
| Cumming | City | Warren | 143 | 162 |
| Curlew | City | Palo Alto | 56 | 62 |
| Cushing | City | Woodbury | 230 | 246 |
| Cylinder | City | Palo Alto | 112 | 110 |
| Dakota City | City | Humboldt | 1,063 | 911 |
| Dallas Center | City | Dallas | 1,496 | 1,595 |
| Dana | City | Greene | 71 | 84 |
| Danbury | City | Woodbury | 449 | 384 |
| Danville | City | Des Moines | 937 | 914 |
| Davenport | City | Scott | 95,722 | 98,359 |
| Davis City | City | Decatur | 257 | 275 |
| Dawson | City | Dallas | 174 | 155 |
| Dayton | City | Webster | 793 | 884 |
| De Soto | City | Dallas | 1,033 | 1,009 |
| De Witt | City | Clinton | 4,633 | 5,049 |
| Decatur City | City | Decatur | 177 | 199 |
| Decorah | City | Winneshiek | 8,150 | 8,172 |
| Dedham | City | Carroll | 264 | 280 |
| Deep River | City | Poweshiek | 345 | 288 |
| Defiance | City | Shelby | 312 | 346 |
| Delaware | City | Delaware | 176 | 188 |
| Delhi | City | Delaware | 544 | 458 |
| Delmar | City | Clinton | 535 | 514 |
| Deloit | City | Crawford | 336 | 288 |
| Delphos | City | Ringgold | 23 | 25 |
| Delta | City | Keokuk | 398 | 410 |
| Denison | City | Crawford | 6,642 | 7,339 |
| Denver | City | Bremer | 1,617 | 1,627 |
| Derby | City | Lucas | 135 | 131 |
| Des Moines | City | Polk | 193,333 | 198,682 |
| Dexter | City | Dallas | 630 | 689 |
| Diagonal | City | Ringgold | 298 | 312 |
| Dickens | City | Clay | 214 | 202 |
| Dike | City | Grundy | 869 | 944 |
| Dixon | City | Scott | 184 | 276 |
| Dolliver | City | Emmet | 103 | 77 |
| Donahue | City | Scott | 318 | 293 |
| Donnellson | City | Lee | 941 | 963 |
| Doon | City | Lyon | 630 | 533 |
| Douds | Census-Designated Place | Van Buren | ... | 165 |
| Dougherty | City | Cerro Gordo | 107 | 80 |
| Dow City | City | Crawford | 445 | 503 |
| Dows | City | 660 | 675 | |
| Drakesville | City | Davis | 186 | 185 |
| Dubuque | City | Dubuque | 57,753 | 57,686 |
| Dumont | City | Butler | 700 | 676 |
| Duncombe | City | Webster | 464 | 474 |
| Dundee | City | Delaware | 179 | 179 |
| Dunkerton | City | Black Hawk | 737 | 749 |
| Dunlap | City | Harrison | 1,297 | 1,139 |
| Durango | City | Dubuque | 30 | 24 |
| Durant | City | 1,556 | 1,677 | |
| Dyersville | City | 3,706 | 4,035 | |
| Dysart | City | Tama | 1,229 | 1,303 |
| Eagle Grove | City | Wright | 3,676 | 3,712 |
| Earlham | City | Madison | 1,167 | 1,298 |
| Earling | City | Shelby | 460 | 471 |
| Earlville | City | Delaware | 870 | 900 |
| Early | City | Sac | 631 | 605 |
| East Peru | City | Madison | 132 | 153 |
| Eddyville | City | 1,042 | 1,064 | |
| Edgewood | City | 837 | 923 | |
| Elberon | City | Tama | 203 | 245 |
| Eldon | City | Wapello | 1,048 | 998 |
| Eldora | City | Hardin | 3,041 | 3,035 |
| Eldridge | City | Scott | 3,567 | 4,159 |
| Elgin | City | Fayette | 594 | 676 |
| Elk Horn | City | Shelby | 665 | 649 |
| Elk Run Heights | City | Black Hawk | 1,086 | 1,052 |
| Elkader | City | Clayton | 1,532 | 1,465 |
| Elkhart | City | Polk | 372 | 362 |
| Elkport | City | Clayton | 82 | 88 |
| Elliott | City | Montgomery | 447 | 402 |
| Ellston | City | Ringgold | 44 | 57 |
| Ellsworth | City | Hamilton | 449 | 531 |
| Elma | City | Howard | 662 | 598 |
| Ely | City | Linn | 515 | 1,149 |
| Emerson | City | Mills | 472 | 480 |
| Emmetsburg | City | Palo Alto | 3,971 | 3,958 |
| Epworth | City | Dubuque | 1,345 | 1,428 |
| Essex | City | Page | 886 | 884 |
| Estherville | City | Emmet | 6,775 | 6,656 |
| Evansdale | City | Black Hawk | 4,679 | 4,526 |
| Everly | City | Clay | 677 | 647 |
| Exira | City | Audubon | 944 | 810 |
| Exline | City | Appanoose | 187 | 191 |
| Fairbank | City | 1,009 | 1,041 | |
| Fairfax | City | Linn | 831 | 889 |
| Fairfield | City | Jefferson | 9,998 | 9,509 |
| Farley | City | Dubuque | 1,371 | 1,334 |
| Farmersburg | City | Clayton | 298 | 300 |
| Farmington | City | Van Buren | 697 | 756 |
| Farnhamville | City | 414 | 430 | |
| Farragut | City | Fremont | 509 | 509 |
| Fayette | City | Fayette | 1,377 | 1,300 |
| Fenton | City | Kossuth | 352 | 317 |
| Ferguson | City | Marshall | 166 | 126 |
| Fertile | City | Worth | 382 | 360 |
| Floris | City | Davis | 172 | 153 |
| Floyd | City | Floyd | 337 | 361 |
| Fonda | City | Pocahontas | 738 | 648 |
| Fontanelle | City | Adair | 840 | 692 |
| Forest City | City | 4,450 | 4,362 | |
| Fort Atkinson | City | Winneshiek | 367 | 389 |
| Fort Dodge | City | Webster | 26,297 | 25,136 |
| Fort Madison | City | Lee | 11,923 | 10,715 |
| Fostoria | City | Clay | 197 | 230 |
| Franklin | City | Lee | 110 | 136 |
| Fraser | City | Boone | 116 | 137 |
| Fredericksburg | City | Chickasaw | 985 | 984 |
| Frederika | City | Bremer | 196 | 199 |
| Fredonia | City | Louisa | 161 | 251 |
| Fremont | City | Mahaska | 712 | 704 |
| Fruitland | City | Muscatine | 446 | 703 |
| Galt | City | Wright | 43 | 30 |
| Galva | City | Ida | 398 | 368 |
| Garber | City | Clayton | 117 | 103 |
| Garden Grove | City | Decatur | 229 | 250 |
| Garnavillo | City | Clayton | 717 | 754 |
| Garner | City | Hancock | 3,003 | 2,922 |
| Garrison | City | Benton | 323 | 413 |
| Garwin | City | Tama | 533 | 565 |
| Geneva | City | Franklin | 174 | 171 |
| George | City | Lyon | 1,111 | 1,051 |
| Gibson | City | Keokuk | 63 | 92 |
| Gilbert | City | Story | 790 | 987 |
| Gilbertville | City | Black Hawk | 748 | 767 |
| Gillett Grove | City | Clay | 67 | 55 |
| Gilman | City | Marshall | 550 | 600 |
| Gilmore City | City | 523 | 556 | |
| Gladbrook | City | Tama | 867 | 1,015 |
| Glenwood | City | Mills | 5,374 | 5,358 |
| Glidden | City | Carroll | 1,095 | 1,253 |
| Goldfield | City | Wright | 713 | 680 |
| Goodell | City | Hancock | 198 | 174 |
| Goose Lake | City | Clinton | 188 | 232 |
| Gowrie | City | Webster | 1,028 | 1,038 |
| Graettinger | City | Palo Alto | 818 | 900 |
| Graf | City | Dubuque | 92 | 73 |
| Grafton | City | Worth | 245 | 290 |
| Grand Junction | City | Greene | 819 | 964 |
| Grand Mound | City | Clinton | 615 | 676 |
| Grand River | City | Decatur | 171 | 225 |
| Grandview | City | Louisa | 518 | 600 |
| Granger | City | Dallas | 650 | 583 |
| Grant | City | Montgomery | 123 | 102 |
| Granville | City | Sioux | 257 | 325 |
| Gravity | City | Taylor | 220 | 218 |
| Gray | City | Audubon | 83 | 82 |
| Greeley | City | Delaware | 284 | 276 |
| Greene | City | Butler | 1,139 | 1,099 |
| Greenfield | City | Adair | 2,114 | 2,129 |
| Greenville | City | Clay | 84 | 93 |
| Grimes | City | 2,677 | 5,098 | |
| Grinnell | City | Poweshiek | 8,978 | 9,105 |
| Griswold | City | Cass | 1,049 | 1,039 |
| Grundy Center | City | Grundy | 2,588 | 2,596 |
| Gruver | City | Emmet | 102 | 106 |
| Guernsey | City | Poweshiek | 70 | 70 |
| Guthrie Center | City | Guthrie | 1,663 | 1,668 |
| Guttenberg | City | Clayton | 2,273 | 1,987 |
| Halbur | City | Carroll | 215 | 202 |
| Hamburg | City | Fremont | 1,381 | 1,240 |
| Hamilton | City | Marion | 115 | 144 |
| Hampton | City | Franklin | 4,150 | 4,218 |
| Hancock | City | Pottawattamie | 196 | 207 |
| Hanlontown | City | Worth | 193 | 229 |
| Hansell | City | Franklin | 92 | 96 |
| Harcourt | City | Webster | 259 | 340 |
| Hardy | City | Humboldt | 44 | 57 |
| Harlan | City | Shelby | 5,249 | 5,282 |
| Harper | City | Keokuk | 147 | 134 |
| Harpers Ferry | City | Allamakee | 281 | 330 |
| Harris | City | Osceola | 177 | 200 |
| Hartford | City | Warren | 769 | 759 |
| Hartley | City | O'Brien | 1,636 | 1,733 |
| Hartwick | City | Poweshiek | 115 | 83 |
| Harvey | City | Marion | 235 | 277 |
| Hastings | City | Mills | 194 | 214 |
| Havelock | City | Pocahontas | 217 | 177 |
| Haverhill | City | Marshall | 94 | 170 |
| Hawarden | City | Sioux | 2,463 | 2,478 |
| Hawkeye | City | Fayette | 461 | 489 |
| Hayesville | City | Keokuk | 62 | 64 |
| Hazleton | City | Buchanan | 737 | 950 |
| Hedrick | City | Keokuk | 825 | 837 |
| Henderson | City | Mills | 182 | 171 |
| Hepburn | City | Page | 58 | 39 |
| Hiawatha | City | Linn | 5,446 | 6,480 |
| Hills | City | Johnson | 662 | 679 |
| Hillsboro | City | Henry | 169 | 205 |
| Hinton | City | Plymouth | 695 | 808 |
| Holland | City | Grundy | 215 | 250 |
| Holstein | City | Ida | 1,456 | 1,470 |
| Holy Cross | City | Dubuque | 293 | 339 |
| Hopkinton | City | Delaware | 692 | 681 |
| Hornick | City | Woodbury | 213 | 253 |
| Hospers | City | Sioux | 663 | 672 |
| Houghton | City | Lee | 120 | 130 |
| Hubbard | City | Hardin | 814 | 885 |
| Hudson | City | Black Hawk | 2,010 | 2,117 |
| Hull | City | Sioux | 1,745 | 1,960 |
| Humboldt | City | Humboldt | 4,590 | 4,452 |
| Humeston | City | Wayne | 580 | 543 |
| Huxley | City | Story | 2,086 | 2,316 |
| Ida Grove | City | Ida | 2,378 | 2,350 |
| Imogene | City | Fremont | 82 | 66 |
| Independence | City | Buchanan | 6,074 | 6,014 |
| Indianola | City | Warren | 11,106 | 12,998 |
| Inwood | City | Lyon | 816 | 875 |
| Ionia | City | Chickasaw | 298 | 277 |
| Iowa City | City | Johnson | 59,780 | 62,220 |
| Iowa Falls | City | Hardin | 5,504 | 5,193 |
| Ireton | City | Sioux | 627 | 585 |
| Irwin | City | Shelby | 394 | 372 |
| Jackson Junction | City | Winneshiek | 89 | 60 |
| Jamaica | City | Guthrie | 232 | 237 |
| Janesville | City | 901 | 829 | |
| Jefferson | City | Greene | 4,380 | 4,626 |
| Jesup | City | 2,088 | 2,212 | |
| Jewell Junction | City | Hamilton | 1,127 | 1,239 |
| Johnston | City | Polk | 4,937 | 8,649 |
| Joice | City | Worth | 245 | 231 |
| Jolley | City | Calhoun | 55 | 54 |
| Kalona | City | Washington | 1,960 | 2,293 |
| Kamrar | City | Hamilton | 217 | 229 |
| Kanawha | City | Hancock | 779 | 739 |
| Kellerton | City | Ringgold | 314 | 372 |
| Kelley | City | Story | 246 | 300 |
| Kellogg | City | Jasper | 703 | 606 |
| Kensett | City | Worth | 349 | 280 |
| Kent | City | Union | 65 | 52 |
| Keokuk | City | Lee | 12,859 | 11,427 |
| Keomah Village | City | Mahaska | 99 | 97 |
| Keosauqua | City | Van Buren | 1,030 | 1,066 |
| Keota | City | Keokuk | 1,000 | 1,025 |
| Keswick | City | Keokuk | 284 | 295 |
| Keystone | City | Benton | 568 | 687 |
| Kimballton | City | Audubon | 289 | 342 |
| Kingsley | City | Plymouth | 1,143 | 1,245 |
| Kinross | City | Keokuk | 89 | 80 |
| Kirkman | City | Shelby | 98 | 76 |
| Kirkville | City | Wapello | 176 | 214 |
| Kiron | City | Crawford | 301 | 273 |
| Klemme | City | Hancock | 587 | 593 |
| Knierim | City | Calhoun | 71 | 70 |
| Knoxville | City | Marion | 8,320 | 7,731 |
| La Motte | City | Jackson | 261 | 272 |
| La Porte City | City | Black Hawk | 2,122 | 2,275 |
| Lacona | City | Warren | 357 | 360 |
| Ladora | City | Iowa | 308 | 287 |
| Lake City | City | Calhoun | 1,855 | 1,787 |
| Lake Mills | City | Winnebago | 2,191 | 2,140 |
| Lake Park | City | Dickinson | 960 | 1,023 |
| Lake View | City | Sac | 1,312 | 1,278 |
| Lakeside | City | Buena Vista | 520 | 484 |
| Lakota | City | Kossuth | 281 | 255 |
| Lambs Grove | City | Jasper | 300 | 225 |
| Lamoni | City | Decatur | 2,329 | 2,444 |
| Lamont | City | Buchanan | 488 | 503 |
| Lanesboro | City | Carroll | 182 | 152 |
| Lansing | City | Allamakee | 1,033 | 1,012 |
| Larchwood | City | Lyon | 765 | 788 |
| Larrabee | City | Cherokee | 186 | 149 |
| Latimer | City | Franklin | 427 | 535 |
| Laurel | City | Marshall | 248 | 266 |
| Laurens | City | Pocahontas | 1,569 | 1,476 |
| Lawler | City | Chickasaw | 517 | 461 |
| Lawton | City | Woodbury | 521 | 697 |
| Le Claire | City | Scott | 2,772 | 2,847 |
| Le Grand | City | 826 | 883 | |
| Le Mars | City | Plymouth | 8,690 | 9,237 |
| Le Roy | City | Decatur | 34 | 13 |
| Leando | Census-Designated Place | Van Buren | ... | 135 |
| Ledyard | City | Kossuth | 164 | 147 |
| Lehigh | City | Webster | 520 | 497 |
| Leighton | City | Mahaska | 135 | 153 |
| Leland | City | Winnebago | 321 | 258 |
| Lenox | City | 1,306 | 1,401 | |
| Leon | City | Decatur | 2,076 | 1,983 |
| Lester | City | Lyon | 252 | 251 |
| Letts | City | Louisa | 374 | 392 |
| Lewis | City | Cass | 433 | 438 |
| Libertyville | City | Jefferson | 264 | 325 |
| Lidderdale | City | Carroll | 200 | 186 |
| Lime Springs | City | Howard | 442 | 496 |
| Lincoln | City | Tama | 188 | 182 |
| Linden | City | Dallas | 201 | 226 |
| Lineville | City | Wayne | 289 | 273 |
| Linn Grove | City | Buena Vista | 209 | 211 |
| Lisbon | City | Linn | 1,352 | 1,898 |
| Liscomb | City | Marshall | 249 | 272 |
| Little Rock | City | Lyon | 458 | 489 |
| Little Sioux | City | Harrison | 206 | 217 |
| Littleport | City | Clayton | 88 | 26 |
| Livermore | City | Humboldt | 436 | 431 |
| Lockridge | City | Jefferson | 270 | 275 |
| Logan | City | Harrison | 1,393 | 1,545 |
| Lohrville | City | Calhoun | 502 | 431 |
| Lone Rock | City | Kossuth | 173 | 157 |
| Lone Tree | City | Johnson | 962 | 1,151 |
| Long Grove | City | Scott | 572 | 597 |
| Lorimor | City | Union | 377 | 427 |
| Lost Nation | City | Clinton | 465 | 497 |
| Lovilia | City | Monroe | 557 | 583 |
| Low Moor | City | Clinton | 224 | 240 |
| Lowden | City | Cedar | 726 | 794 |
| Lu Verne | City | 342 | 299 | |
| Luana | City | Clayton | 190 | 249 |
| Lucas | City | Lucas | 224 | 243 |
| Luther | City | Boone | 145 | 158 |
| Luxemburg | City | Dubuque | 257 | 246 |
| Luzerne | City | Benton | 93 | 105 |
| Lynnville | City | Jasper | 393 | 366 |
| Lytton | City | 320 | 305 | |
| Macedonia | City | Pottawattamie | 249 | 325 |
| Macksburg | City | Madison | 110 | 142 |
| Madrid | City | Boone | 2,544 | 2,264 |
| Magnolia | City | Harrison | 173 | 200 |
| Malcom | City | Poweshiek | 447 | 352 |
| Mallard | City | Palo Alto | 365 | 298 |
| Maloy | City | Ringgold | 36 | 28 |
| Malvern | City | Mills | 1,212 | 1,256 |
| Manchester | City | Delaware | 5,196 | 5,257 |
| Manilla | City | Crawford | 856 | 839 |
| Manly | City | Worth | 1,360 | 1,342 |
| Manning | City | Carroll | 1,504 | 1,490 |
| Manson | City | Calhoun | 1,822 | 1,893 |
| Mapleton | City | Monona | 1,339 | 1,416 |
| Maquoketa | City | Jackson | 6,237 | 6,112 |
| Marathon | City | Buena Vista | 320 | 302 |
| Marble Rock | City | Floyd | 359 | 326 |
| Marcus | City | Cherokee | 1,173 | 1,139 |
| Marengo | City | Iowa | 2,377 | 2,535 |
| Marion | City | Linn | 20,479 | 26,294 |
| Marne | City | Cass | 149 | 149 |
| Marquette | City | Clayton | 479 | 421 |
| Marshalltown | City | Marshall | 25,347 | 26,009 |
| Martelle | City | Jones | 290 | 280 |
| Martensdale | City | Warren | 487 | 467 |
| Martinsburg | City | Keokuk | 155 | 126 |
| Marysville | City | Marion | 65 | 54 |
| Mason City | City | Cerro Gordo | 29,289 | 29,172 |
| Masonville | City | Delaware | 132 | 104 |
| Massena | City | Cass | 372 | 414 |
| Matlock | City | Sioux | 105 | 83 |
| Maurice | City | Sioux | 260 | 254 |
| Maxwell | City | Story | 812 | 807 |
| Maynard | City | Fayette | 491 | 500 |
| Maysville | City | Scott | 173 | 163 |
| McCallsburg | City | Story | 292 | 318 |
| McCausland | City | Scott | 308 | 299 |
| McClelland | City | Pottawattamie | 139 | 129 |
| McGregor | City | Clayton | 800 | 871 |
| McIntire | City | Mitchell | 153 | 173 |
| Mechanicsville | City | Cedar | 1,080 | 1,173 |
| Mediapolis | City | Des Moines | 1,637 | 1,644 |
| Melbourne | City | Marshall | 756 | 794 |
| Melcher-Dallas | City | Marion | 1,321 | 1,298 |
| Melrose | City | Monroe | 150 | 130 |
| Melvin | City | Osceola | 244 | 243 |
| Menlo | City | Guthrie | 368 | 365 |
| Meriden | City | Cherokee | 189 | 184 |
| Merrill | City | Plymouth | 719 | 754 |
| Meservey | City | Cerro Gordo | 280 | 252 |
| Middletown | City | Des Moines | 390 | 535 |
| Miles | City | Jackson | 383 | 462 |
| Milford | City | Dickinson | 2,148 | 2,474 |
| Millersburg | City | Iowa | 188 | 184 |
| Millerton | City | Wayne | 44 | 48 |
| Millville | City | Clayton | 34 | 23 |
| Milo | City | Warren | 860 | 839 |
| Milton | City | Van Buren | 509 | 550 |
| Minburn | City | Dallas | 348 | 391 |
| Minden | City | Pottawattamie | 532 | 564 |
| Mingo | City | Jasper | 252 | 269 |
| Missouri Valley | City | Harrison | 2,909 | 2,992 |
| Mitchell | City | Mitchell | 279 | 155 |
| Mitchellville | City | 1,639 | 1,715 | |
| Modale | City | Harrison | 290 | 303 |
| Mondamin | City | Harrison | 459 | 423 |
| Monmouth | City | Jackson | 169 | 180 |
| Monona | City | Clayton | 1,519 | 1,550 |
| Monroe | City | Jasper | 1,747 | 1,808 |
| Montezuma | City | Poweshiek | 1,690 | 1,440 |
| Monticello | City | Jones | 3,551 | 3,607 |
| Montour | City | Tama | 312 | 285 |
| Montrose | City | Lee | 947 | 957 |
| Moorhead | City | Monona | 291 | 232 |
| Moorland | City | Webster | 279 | 197 |
| Moravia | City | Appanoose | 679 | 713 |
| Morley | City | Jones | 85 | 88 |
| Morning Sun | City | Louisa | 843 | 872 |
| Morrison | City | Grundy | 120 | 97 |
| Moulton | City | Appanoose | 575 | 658 |
| Mount Auburn | City | Benton | 141 | 160 |
| Mount Ayr | City | Ringgold | 1,855 | 1,822 |
| Mount Pleasant | City | Henry | 8,020 | 8,751 |
| Mount Sterling | City | Van Buren | 53 | 40 |
| Mount Union | City | Henry | 166 | 132 |
| Mount Vernon | City | Linn | 3,676 | 3,390 |
| Moville | City | Woodbury | 1,297 | 1,583 |
| Murray | City | Clarke | 734 | 766 |
| Muscatine | City | Muscatine | 22,967 | 22,697 |
| Mystic | City | Appanoose | 545 | 588 |
| Nashua | City | Chickasaw | 1,520 | 1,618 |
| Nemaha | City | Sac | 112 | 102 |
| Neola | City | Pottawattamie | 913 | 845 |
| Nevada | City | Story | 6,045 | 6,658 |
| New Albin | City | Allamakee | 536 | 527 |
| New Hampton | City | Chickasaw | 3,820 | 3,692 |
| New Hartford | City | Butler | 694 | 659 |
| New Liberty | City | Scott | 142 | 121 |
| New London | City | Henry | 2,005 | 1,937 |
| New Market | City | Taylor | 454 | 456 |
| New Providence | City | Hardin | 247 | 227 |
| New Sharon | City | Mahaska | 1,145 | 1,301 |
| New Vienna | City | Dubuque | 376 | 400 |
| New Virginia | City | Warren | 434 | 469 |
| Newell | City | Buena Vista | 947 | 887 |
| Newhall | City | Benton | 969 | 886 |
| Newton | City | Jasper | 14,870 | 15,579 |
| Nichols | City | Muscatine | 366 | 374 |
| Nodaway | City | Adams | 147 | 132 |
| Nora Springs | City | 1,514 | 1,532 | |
| North Buena Vista | City | Clayton | 145 | 124 |
| North English | City | 955 | 991 | |
| North Liberty | City | Johnson | 3,063 | 5,367 |
| North Washington | City | Chickasaw | 98 | 118 |
| Northboro | City | Page | 75 | 60 |
| Northwood | City | Worth | 1,960 | 2,050 |
| Norwalk | City | Warren | 5,757 | 6,884 |
| Norway | City | Benton | 568 | 601 |
| Numa | City | Appanoose | 150 | 109 |
| Oakland | City | Pottawattamie | 1,521 | 1,487 |
| Oakland Acres | City | Jasper | 152 | 166 |
| Oakville | City | Louisa | 439 | 439 |
| Ocheyedan | City | Osceola | 531 | 536 |
| Odebolt | City | Sac | 1,159 | 1,153 |
| Oelwein | City | Fayette | 6,928 | 6,692 |
| Ogden | City | Boone | 1,913 | 2,023 |
| Okoboji | City | Dickinson | 772 | 820 |
| Olds | City | Henry | 196 | 249 |
| Olin | City | Jones | 663 | 716 |
| Ollie | City | Keokuk | 205 | 224 |
| Onawa | City | Monona | 2,950 | 3,091 |
| Onslow | City | Jones | 216 | 223 |
| Orange City | City | Sioux | 5,065 | 5,582 |
| Orchard | City | Mitchell | 93 | 88 |
| Orient | City | Adair | 352 | 402 |
| Orleans | City | Dickinson | 560 | 583 |
| Osage | City | Mitchell | 3,446 | 3,451 |
| Osceola | City | Clarke | 4,202 | 4,659 |
| Oskaloosa | City | Mahaska | 10,730 | 10,938 |
| Ossian | City | Winneshiek | 826 | 853 |
| Osterdock | City | Clayton | 49 | 50 |
| Otho | City | Webster | 542 | 571 |
| Oto | City | Woodbury | 137 | 145 |
| Ottosen | City | Humboldt | 72 | 61 |
| Ottumwa | City | Wapello | 24,603 | 24,998 |
| Owasa | City | Hardin | 37 | 38 |
| Oxford | City | Johnson | 670 | 705 |
| Oxford Junction | City | Jones | 581 | 573 |
| Oyens | City | Plymouth | 113 | 132 |
| Pacific Junction | City | Mills | 542 | 507 |
| Packwood | City | Jefferson | 195 | 223 |
| Palmer | City | Pocahontas | 230 | 214 |
| Palo | City | Linn | 518 | 614 |
| Panama | City | Shelby | 201 | 212 |
| Panora | City | Guthrie | 1,112 | 1,175 |
| Panorama Park | City | Scott | 107 | 111 |
| Park View | Census-Designated Place | Scott | 2,192 | 2,169 |
| Parkersburg | City | Butler | 1,810 | 1,889 |
| Parnell | City | Iowa | 209 | 220 |
| Paton | City | Greene | 255 | 265 |
| Patterson | City | Madison | 128 | 126 |
| Paullina | City | O'Brien | 1,162 | 1,124 |
| Pella | City | Marion | 9,347 | 9,832 |
| Peosta | City | Dubuque | 136 | 651 |
| Perry | City | Dallas | 6,675 | 7,633 |
| Persia | City | Harrison | 311 | 363 |
| Peterson | City | Clay | 399 | 372 |
| Pierson | City | Woodbury | 306 | 371 |
| Pilot Mound | City | Boone | 199 | 214 |
| Pioneer | City | Humboldt | 46 | 21 |
| Pisgah | City | Harrison | 260 | 316 |
| Plainfield | City | Bremer | 453 | 438 |
| Plano | City | Appanoose | 75 | 58 |
| Pleasant Hill | City | Polk | 3,817 | 5,070 |
| Pleasant Plain | City | Jefferson | 128 | 131 |
| Pleasanton | City | Decatur | 58 | 37 |
| Pleasantville | City | Marion | 1,483 | 1,539 |
| Plover | City | Pocahontas | 104 | 95 |
| Plymouth | City | Cerro Gordo | 445 | 429 |
| Pocahontas | City | Pocahontas | 2,151 | 1,970 |
| Polk City | City | Polk | 1,878 | 2,344 |
| Pomeroy | City | Calhoun | 767 | 710 |
| Popejoy | City | Franklin | 92 | 78 |
| Portsmouth | City | Shelby | 209 | 225 |
| Postville | City | 1,473 | 2,273 | |
| Prairie City | City | Jasper | 1,383 | 1,365 |
| Prairieburg | City | Linn | 203 | 175 |
| Prescott | City | Adams | 284 | 266 |
| Preston | City | Jackson | 1,049 | 949 |
| Primghar | City | O'Brien | 969 | 891 |
| Princeton | City | Scott | 891 | 946 |
| Promise City | City | Wayne | 132 | 105 |
| Protivin | City | 310 | 317 | |
| Pulaski | City | Davis | 258 | 249 |
| Quasqueton | City | Buchanan | 585 | 574 |
| Quimby | City | Cherokee | 339 | 368 |
| Radcliffe | City | Hardin | 574 | 607 |
| Rake | City | Winnebago | 238 | 227 |
| Ralston | City | 128 | 98 | |
| Randalia | City | Fayette | 88 | 84 |
| Randall | City | Hamilton | 161 | 148 |
| Randolph | City | Fremont | 226 | 209 |
| Rathbun | City | Appanoose | 89 | 88 |
| Raymond | City | Black Hawk | 614 | 537 |
| Readlyn | City | Bremer | 773 | 786 |
| Reasnor | City | Jasper | 191 | 194 |
| Red Oak | City | Montgomery | 6,278 | 6,197 |
| Redding | City | Ringgold | 119 | 78 |
| Redfield | City | Dallas | 883 | 833 |
| Reinbeck | City | Grundy | 1,635 | 1,751 |
| Rembrandt | City | Buena Vista | 210 | 228 |
| Remsen | City | Plymouth | 1,527 | 1,762 |
| Renwick | City | Humboldt | 287 | 306 |
| Rhodes | City | Marshall | 270 | 294 |
| Riceville | City | 812 | 840 | |
| Richland | City | Keokuk | 522 | 587 |
| Rickardsville | City | Dubuque | 155 | 191 |
| Ricketts | City | Crawford | 122 | 144 |
| Ridgeway | City | Winneshiek | 288 | 293 |
| Rinard | City | Calhoun | 71 | 72 |
| Ringsted | City | Emmet | 500 | 436 |
| Rippey | City | Greene | 275 | 319 |
| Riverdale | City | Scott | 788 | 656 |
| Riverside | City | Washington | 831 | 928 |
| Riverton | City | Fremont | 324 | 304 |
| Robins | City | Linn | 955 | 1,806 |
| Rock Falls | City | Cerro Gordo | 131 | 170 |
| Rock Rapids | City | Lyon | 2,723 | 2,573 |
| Rock Valley | City | Sioux | 2,663 | 2,702 |
| Rockford | City | Floyd | 892 | 907 |
| Rockwell | City | Cerro Gordo | 801 | 989 |
| Rockwell City | City | Calhoun | 1,994 | 2,264 |
| Rodman | City | Palo Alto | 56 | 56 |
| Rodney | City | Monona | 71 | 74 |
| Roland | City | Story | 1,042 | 1,324 |
| Rolfe | City | Pocahontas | 752 | 675 |
| Rome | City | Henry | 168 | 113 |
| Rose Hill | City | Mahaska | 156 | 205 |
| Rossie | City | Clay | 94 | 58 |
| Rowan | City | Wright | 189 | 218 |
| Rowley | City | Buchanan | 272 | 290 |
| Royal | City | Clay | 442 | 479 |
| Rudd | City | Floyd | 433 | 431 |
| Runnells | City | Polk | 306 | 352 |
| Russell | City | Lucas | 531 | 559 |
| Ruthven | City | Palo Alto | 708 | 711 |
| Rutland | City | Humboldt | 216 | 145 |
| Ryan | City | Delaware | 386 | 410 |
| Sabula | City | Jackson | 714 | 670 |
| Sac City | City | Sac | 2,528 | 2,368 |
| Sageville | City | Dubuque | 201 | 203 |
| Salem | City | Henry | 463 | 464 |
| Salix | City | Woodbury | 356 | 370 |
| Sanborn | City | O'Brien | 1,347 | 1,353 |
| Sandyville | City | Warren | 60 | 61 |
| Saylorville | Census-Designated Place | Polk | ... | 3,238 |
| Scarville | City | Winnebago | 92 | 97 |
| Schaller | City | Sac | 768 | 779 |
| Schleswig | City | Crawford | 927 | 833 |
| Scranton | City | Greene | 601 | 604 |
| Searsboro | City | Poweshiek | 164 | 155 |
| Sergeant Bluff | City | Woodbury | 2,866 | 3,321 |
| Seymour | City | Wayne | 869 | 810 |
| Shambaugh | City | Page | 207 | 188 |
| Shannon City | City | 92 | 70 | |
| Sharpsburg | City | Taylor | 116 | 98 |
| Sheffield | City | Franklin | 1,173 | 930 |
| Shelby | City | 637 | 696 | |
| Sheldahl | City | 315 | 336 | |
| Sheldon | City | 4,976 | 4,914 | |
| Shell Rock | City | Butler | 1,398 | 1,298 |
| Shellsburg | City | Benton | 774 | 938 |
| Shenandoah | City | 5,615 | 5,546 | |
| Sherrill | City | Dubuque | 158 | 186 |
| Shueyville | City | Johnson | 161 | 250 |
| Sibley | City | Osceola | 2,808 | 2,796 |
| Sidney | City | Fremont | 1,242 | 1,300 |
| Sigourney | City | Keokuk | 2,150 | 2,209 |
| Silver City | City | Mills | 252 | 259 |
| Sioux Center | City | Sioux | 5,017 | 6,002 |
| Sioux City | City | 80,682 | 85,013 | |
| Sioux Rapids | City | Buena Vista | 788 | 720 |
| Slater | City | Story | 1,268 | 1,306 |
| Sloan | City | Woodbury | 927 | 1,032 |
| Smithland | City | Woodbury | 287 | 221 |
| Soldier | City | Monona | 205 | 207 |
| Solon | City | Johnson | 1,062 | 1,177 |
| Somers | City | Calhoun | 183 | 165 |
| South English | City | Keokuk | 237 | 213 |
| Spencer | City | Clay | 11,210 | 11,317 |
| Spillville | City | Winneshiek | 395 | 386 |
| Spirit Lake | City | Dickinson | 3,888 | 4,261 |
| Spragueville | City | Jackson | 118 | 89 |
| Spring Hill | City | Warren | 86 | 92 |
| Springbrook | City | Jackson | 165 | 182 |
| Springville | City | Linn | 1,066 | 1,091 |
| St. Ansgar | City | Mitchell | 1,173 | 1,031 |
| St. Anthony | City | Marshall | 115 | 109 |
| St. Charles | City | Madison | 537 | 619 |
| St. Donatus | City | Jackson | 145 | 140 |
| St. Lucas | City | Fayette | 164 | 178 |
| St. Marys | City | Warren | 111 | 134 |
| St. Olaf | City | Clayton | 125 | 136 |
| St. Paul | City | Lee | 120 | 118 |
| Stacyville | City | Mitchell | 469 | 469 |
| Stanhope | City | Hamilton | 450 | 488 |
| Stanley | City | 118 | 128 | |
| Stanton | City | Montgomery | 697 | 714 |
| Stanwood | City | Cedar | 647 | 680 |
| State Center | City | Marshall | 1,248 | 1,349 |
| Steamboat Rock | City | Hardin | 335 | 336 |
| Stockport | City | Van Buren | 260 | 284 |
| Stockton | City | Muscatine | 187 | 182 |
| Storm Lake | City | Buena Vista | 8,953 | 10,076 |
| Story City | City | Story | 2,970 | 3,228 |
| Stout | City | Grundy | 192 | 217 |
| Stratford | City | 733 | 746 | |
| Strawberry Point | City | Clayton | 1,367 | 1,386 |
| Struble | City | Plymouth | 67 | 85 |
| Stuart | City | 1,529 | 1,712 | |
| Sully | City | Jasper | 861 | 904 |
| Sumner | City | 2,109 | 2,106 | |
| Superior | City | Dickinson | 131 | 142 |
| Sutherland | City | O'Brien | 714 | 707 |
| Swaledale | City | Cerro Gordo | 457 | 174 |
| Swan | City | Marion | 70 | 121 |
| Swea City | City | Kossuth | 633 | 642 |
| Swisher | City | Johnson | 634 | 813 |
| Tabor | City | 958 | 993 | |
| Tama | City | Tama | 2,715 | 2,731 |
| Templeton | City | Carroll | 319 | 334 |
| Tennant | City | Shelby | 78 | 73 |
| Terril | City | Dickinson | 383 | 404 |
| Thayer | City | Union | 79 | 66 |
| Thompson | City | Winnebago | 516 | 596 |
| Thor | City | Humboldt | 214 | 174 |
| Thornburg | City | Keokuk | 91 | 84 |
| Thornton | City | Cerro Gordo | 384 | 422 |
| Thurman | City | Fremont | 235 | 236 |
| Tiffin | City | Johnson | 456 | 975 |
| Tingley | City | Ringgold | 179 | 171 |
| Tipton | City | Cedar | 3,037 | 3,155 |
| Titonka | City | Kossuth | 618 | 584 |
| Toledo | City | Tama | 2,393 | 2,539 |
| Toronto | City | Clinton | 135 | 134 |
| Traer | City | Tama | 1,556 | 1,594 |
| Treynor | City | Pottawattamie | 956 | 950 |
| Tripoli | City | Bremer | 1,111 | 1,310 |
| Truesdale | City | Buena Vista | 151 | 91 |
| Truro | City | Madison | 392 | 427 |
| Turin | City | Monona | 104 | 75 |
| Udell | City | Appanoose | 76 | 58 |
| Underwood | City | Pottawattamie | 515 | 688 |
| Union | City | Hardin | 448 | 427 |
| Unionville | City | Appanoose | 133 | 127 |
| University Heights | City | Johnson | 1,036 | 987 |
| University Park | City | Mahaska | 595 | 536 |
| Urbana | City | Benton | 635 | 1,019 |
| Urbandale | City | 23,515 | 29,072 | |
| Ute | City | Monona | 392 | 378 |
| Vail | City | Crawford | 432 | 452 |
| Valeria | City | Jasper | 69 | 62 |
| Van Horne | City | Benton | 683 | 716 |
| Van Meter | City | Dallas | 754 | 866 |
| Van Wert | City | Decatur | 249 | 231 |
| Varina | City | Pocahontas | 102 | 90 |
| Ventura | City | Cerro Gordo | 639 | 670 |
| Victor | City | 972 | 952 | |
| Villisca | City | Montgomery | 1,354 | 1,344 |
| Vincent | City | Webster | 185 | 158 |
| Vining | City | Tama | 78 | 70 |
| Vinton | City | Benton | 5,121 | 5,102 |
| Volga | City | Clayton | 318 | 247 |
| Wadena | City | Fayette | 236 | 243 |
| Wahpeton | City | Dickinson | 482 | 462 |
| Walcott | City | 1,345 | 1,528 | |
| Walford | City | 248 | 1,224 | |
| Walker | City | Linn | 669 | 750 |
| Wall Lake | City | Sac | 875 | 841 |
| Wallingford | City | Emmet | 205 | 210 |
| Walnut | City | Pottawattamie | 803 | 778 |
| Wapello | City | Louisa | 2,041 | 2,124 |
| Washington | City | Washington | 7,158 | 7,047 |
| Washta | City | Cherokee | 279 | 282 |
| Waterloo | City | Black Hawk | 66,732 | 68,747 |
| Waterville | City | Allamakee | 172 | 145 |
| Waucoma | City | Fayette | 386 | 299 |
| Waukee | City | Dallas | 2,828 | 5,126 |
| Waukon | City | Allamakee | 4,516 | 4,131 |
| Waverly | City | Bremer | 8,718 | 8,968 |
| Wayland | City | Henry | 819 | 945 |
| Webb | City | Clay | 165 | 165 |
| Webster | City | Keokuk | 103 | 110 |
| Webster City | City | Hamilton | 7,969 | 8,176 |
| Weldon | City | Decatur | 151 | 145 |
| Wellman | City | Washington | 1,132 | 1,393 |
| Wellsburg | City | Grundy | 682 | 716 |
| Welton | City | Clinton | 184 | 159 |
| Wesley | City | Kossuth | 461 | 467 |
| West Bend | City | 951 | 834 | |
| West Branch | City | 1,936 | 2,188 | |
| West Burlington | City | Des Moines | 3,077 | 3,161 |
| West Chester | City | Washington | 178 | 159 |
| West Des Moines | City | 32,193 | 46,403 | |
| West Liberty | City | Muscatine | 2,954 | 3,332 |
| West Okoboji | City | Dickinson | 266 | 432 |
| West Point | City | Lee | 1,147 | 980 |
| West Union | City | Fayette | 2,509 | 2,549 |
| Westfield | City | Plymouth | 160 | 189 |
| Westgate | City | Fayette | 209 | 234 |
| Westphalia | City | Shelby | 140 | 160 |
| Westside | City | Crawford | 380 | 327 |
| Westwood | City | Henry | 82 | 127 |
| What Cheer | City | Keokuk | 762 | 678 |
| Wheatland | City | Clinton | 727 | 772 |
| Whiting | City | Monona | 683 | 707 |
| Whittemore | City | Kossuth | 548 | 530 |
| Whitten | City | Hardin | 137 | 160 |
| Willey | City | Carroll | 78 | 103 |
| Williams | City | Hamilton | 358 | 427 |
| Williamsburg | City | Iowa | 2,195 | 2,622 |
| Williamson | City | Lucas | 166 | 163 |
| Wilton | City | 2,567 | 2,829 | |
| Windsor Heights | City | Polk | 5,144 | 4,805 |
| Winfield | City | Henry | 1,051 | 1,131 |
| Winterset | City | Madison | 4,463 | 4,768 |
| Winthrop | City | Buchanan | 754 | 772 |
| Wiota | City | Cass | 160 | 149 |
| Woden | City | Hancock | 305 | 243 |
| Woodbine | City | Harrison | 1,613 | 1,564 |
| Woodburn | City | Clarke | 240 | 244 |
| Woodward | City | Dallas | 1,192 | 1,200 |
| Woolstock | City | Wright | 212 | 204 |
| Worthington | City | Dubuque | 417 | 381 |
| Wyoming | City | Jones | 657 | 626 |
| Yale | City | Guthrie | 220 | 287 |
| Yetter | City | Calhoun | 49 | 36 |
| Yorktown | City | Page | 92 | 82 |
| Zearing | City | Story | 614 | 617 |
| Zwingle | City | 83 | 100 |
Change: (C 2000-04-01) in comparison to (C 1990-04-01).
Source: US Census Bureau (web).
2008-02-26HTTP://WWW.CITYPOPULATION.DE© TH. BRINKHOFF