All counties in the State of Colorado.
| Name | Status | Population census 1990-04-01 | Population census 2000-04-01 | Population census 2010-04-01 | |
|---|---|---|---|---|---|
| Adams (prior 2010 with parts of Broomfield) | County | 265,038 | 348,076 | 441,603 | o |
| Alamosa | County | 13,617 | 14,965 | 15,445 | o |
| Arapahoe | County | 391,572 | 488,829 | 572,003 | o |
| Archuleta | County | 5,345 | 9,894 | 12,084 | o |
| Baca | County | 4,556 | 4,517 | 3,788 | o |
| Bent | County | 5,048 | 5,996 | 6,499 | o |
| Boulder (prior 2010 with parts of Broomfield) | County | 225,339 | 269,784 | 294,567 | o |
| Broomfield | County | ... | ... | 55,889 | o |
| Chaffee | County | 12,684 | 16,250 | 17,809 | o |
| Cheyenne | County | 2,397 | 2,229 | 1,836 | o |
| Clear Creek | County | 7,619 | 9,263 | 9,088 | o |
| Conejos | County | 7,453 | 8,400 | 8,256 | o |
| Costilla | County | 3,190 | 3,661 | 3,524 | o |
| Crowley | County | 3,946 | 5,514 | 5,823 | o |
| Custer | County | 1,926 | 3,508 | 4,255 | o |
| Delta | County | 20,980 | 27,824 | 30,952 | o |
| Denver | County | 467,549 | 553,805 | 600,158 | o |
| Dolores | County | 1,504 | 1,844 | 2,064 | o |
| Douglas | County | 60,391 | 175,732 | 285,465 | o |
| Eagle | County | 21,928 | 41,623 | 52,197 | o |
| El Paso | County | 397,014 | 516,934 | 622,263 | o |
| Elbert | County | 9,646 | 19,855 | 23,086 | o |
| Fremont | County | 32,273 | 46,140 | 46,824 | o |
| Garfield | County | 29,974 | 43,786 | 56,389 | o |
| Gilpin | County | 3,070 | 4,746 | 5,441 | o |
| Grand | County | 7,966 | 12,433 | 14,843 | o |
| Gunnison | County | 10,273 | 14,000 | 15,324 | o |
| Hinsdale | County | 467 | 792 | 843 | o |
| Huerfano | County | 6,009 | 7,859 | 6,711 | o |
| Jackson | County | 1,605 | 1,577 | 1,394 | o |
| Jefferson (prior 2010 with parts of Broomfield) | County | 438,430 | 525,449 | 534,543 | o |
| Kiowa | County | 1,688 | 1,622 | 1,398 | o |
| Kit Carson | County | 7,140 | 8,013 | 8,270 | o |
| La Plata | County | 32,284 | 43,957 | 51,334 | o |
| Lake | County | 6,007 | 7,814 | 7,310 | o |
| Larimer | County | 186,136 | 251,489 | 299,630 | o |
| Las Animas | County | 13,765 | 15,212 | 15,507 | o |
| Lincoln | County | 4,529 | 6,089 | 5,467 | o |
| Logan | County | 17,567 | 20,566 | 22,709 | o |
| Mesa | County | 93,145 | 116,939 | 146,723 | o |
| Mineral | County | 558 | 831 | 712 | o |
| Moffat | County | 11,357 | 13,178 | 13,795 | o |
| Montezuma | County | 18,672 | 23,822 | 25,535 | o |
| Montrose | County | 24,423 | 33,438 | 41,276 | o |
| Morgan | County | 21,939 | 27,172 | 28,159 | o |
| Otero | County | 20,185 | 20,311 | 18,831 | o |
| Ouray | County | 2,295 | 3,747 | 4,436 | o |
| Park | County | 7,174 | 14,519 | 16,206 | o |
| Phillips | County | 4,189 | 4,485 | 4,442 | o |
| Pitkin | County | 12,661 | 14,889 | 17,148 | o |
| Prowers | County | 13,347 | 14,483 | 12,551 | o |
| Pueblo | County | 123,051 | 141,490 | 159,063 | o |
| Rio Blanco | County | 6,051 | 5,992 | 6,666 | o |
| Rio Grande | County | 10,770 | 12,425 | 11,982 | o |
| Routt | County | 14,088 | 19,679 | 23,509 | o |
| Saguache | County | 4,619 | 5,904 | 6,108 | o |
| San Juan | County | 745 | 558 | 699 | o |
| San Miguel | County | 3,653 | 6,593 | 7,359 | o |
| Sedgwick | County | 2,690 | 2,747 | 2,379 | o |
| Summit | County | 12,881 | 23,560 | 27,994 | o |
| Teller | County | 12,468 | 20,541 | 23,350 | o |
| Washington | County | 4,812 | 4,922 | 4,814 | o |
| Weld (prior 2010 with parts of Broomfield) | County | 131,821 | 180,766 | 252,825 | o |
| Yuma | County | 8,954 | 9,846 | 10,043 | o |
| Colorado | Federal State | 3,294,473 | 4,302,086 | 5,029,196 |
All places in the State of Colorado.
| Name | Status | County | Population census 1990-04-01 | Population census 2000-04-01 | Population census 2010-04-01 | |
|---|---|---|---|---|---|---|
| Acres Green | Census-Designated Place | Douglas | ... | 3,205 | 3,007 | o |
| Aetna Estates | Census-Designated Place | Arapahoe | ... | ... | 834 | o |
| Aguilar | Town | Las Animas | 527 | 593 | 538 | o |
| Air Force Academy | Census-Designated Place | El Paso | 9,062 | 7,526 | 6,680 | o |
| Akron | Town | Washington | 1,621 | 1,727 | 1,702 | o |
| Alamosa | City | Alamosa | ... | 8,437 | 8,780 | o |
| Alamosa East | Census-Designated Place | Alamosa | 1,389 | 1,528 | 1,458 | o |
| Allenspark | Census-Designated Place | Boulder | ... | ... | 528 | o |
| Alma | Town | Park | 141 | 179 | 270 | o |
| Alpine | Census-Designated Place | Rio Grande | ... | ... | 174 | o |
| Altona | Census-Designated Place | Boulder | ... | ... | 501 | o |
| Amherst | Census-Designated Place | Phillips | ... | ... | 58 | o |
| Antonito | Town | Conejos | 896 | 873 | 781 | o |
| Applewood | Census-Designated Place | Jefferson | ... | ... | 7,160 | o |
| Arboles | Census-Designated Place | Archuleta | ... | 232 | 280 | o |
| Aristocrat Ranchettes | Census-Designated Place | Weld | ... | 1,254 | 1,344 | o |
| Arriba | Town | Lincoln | 218 | 244 | 193 | o |
| Arvada | City | 89,786 | 102,365 | 106,433 | o | |
| Aspen | City | Pitkin | 5,181 | 6,007 | 6,658 | o |
| Aspen Park | Census-Designated Place | Jefferson | ... | ... | 882 | o |
| Atwood | Census-Designated Place | Logan | ... | ... | 133 | o |
| Ault | Town | Weld | 946 | 1,430 | 1,519 | o |
| Aurora | City | 221,855 | 276,449 | 325,078 | o | |
| Avon | Town | Eagle | 1,783 | 5,661 | 6,447 | o |
| Avondale | Census-Designated Place | Pueblo | ... | ... | 674 | o |
| Bark Ranch | Census-Designated Place | Boulder | ... | ... | 213 | o |
| Basalt | Town | 1,282 | 2,730 | 3,857 | o | |
| Battlement Mesa | Census-Designated Place | Garfield | ... | ... | 4,471 | o |
| Bayfield | Town | La Plata | 1,106 | 1,584 | 2,333 | o |
| Bennett | Town | 1,769 | 2,050 | 2,308 | o | |
| Berkley | Census-Designated Place | Adams | ... | ... | 11,207 | o |
| Berthoud | Town | 3,087 | 4,973 | 5,105 | o | |
| Bethune | Town | Kit Carson | 178 | 225 | 237 | o |
| Beulah Valley | Census-Designated Place | Pueblo | ... | ... | 556 | o |
| Black Forest | Census-Designated Place | El Paso | ... | ... | 13,116 | o |
| Black Hawk | City | Gilpin | 227 | 118 | 118 | o |
| Blanca | Town | Costilla | 272 | 391 | 385 | o |
| Blende | Census-Designated Place | Pueblo | ... | ... | 878 | o |
| Blue River | Town | Summit | 438 | 685 | 849 | o |
| Blue Sky | Census-Designated Place | Morgan | ... | ... | 24 | o |
| Bonanza | Town | Saguache | 16 | 14 | 16 | o |
| Bonanza Mountain Estates | Census-Designated Place | Boulder | ... | ... | 128 | o |
| Boone | Town | Pueblo | 339 | 323 | 339 | o |
| Boulder | City | Boulder | 86,098 | 94,571 | 97,385 | o |
| Bow Mar | Town | 853 | 838 | 866 | o | |
| Brandon | Census-Designated Place | Kiowa | ... | ... | 21 | o |
| Branson | Town | Las Animas | 58 | 77 | 74 | o |
| Breckenridge | Town | Summit | ... | 2,752 | 4,540 | o |
| Brick Center | Census-Designated Place | Arapahoe | ... | ... | 107 | o |
| Brighton | City | 14,292 | 21,009 | 33,352 | o | |
| Brookside | Town | Fremont | 221 | 214 | 233 | o |
| Broomfield | City | 24,966 | 39,193 | 55,889 | o | |
| Brush | City | Morgan | 4,136 | 5,119 | 5,463 | o |
| Buena Vista | Town | Chaffee | 1,779 | 2,196 | 2,617 | o |
| Burlington | City | Kit Carson | 2,860 | 3,678 | 4,254 | o |
| Byers | Census-Designated Place | Arapahoe | ... | ... | 1,160 | o |
| Calhan | Town | El Paso | 530 | 896 | 780 | o |
| Campo | Town | Baca | 129 | 150 | 109 | o |
| Cañon City | City | Fremont | 12,774 | 15,555 | 16,400 | o |
| Capulin | Census-Designated Place | Conejos | ... | ... | 200 | o |
| Carbondale | Town | Garfield | 3,090 | 5,216 | 6,427 | o |
| Cascade-Chipita Park | Census-Designated Place | El Paso | 1,479 | 1,709 | 1,655 | o |
| Castle Pines | Census-Designated Place | Douglas | ... | ... | 3,614 | o |
| Castle Pines North | City | Douglas | ... | 3,616 | 10,360 | o |
| Castle Rock | Town | Douglas | 8,244 | 20,323 | 48,231 | o |
| Cathedral | Census-Designated Place | Hinsdale | ... | ... | 14 | o |
| Catherine | Census-Designated Place | Garfield | ... | ... | 228 | o |
| Cattle Creek | Census-Designated Place | Garfield | ... | ... | 641 | o |
| Cedaredge | Town | Delta | 1,413 | 1,848 | 2,253 | o |
| Centennial | City | Arapahoe | ... | 102,673 | 100,377 | o |
| Center | Town | 1,947 | 2,392 | 2,230 | o | |
| Central City | City | Gilpin | 335 | 515 | 663 | o |
| Chacra | Census-Designated Place | Garfield | ... | ... | 329 | o |
| Cheraw | Town | Otero | 271 | 213 | 252 | o |
| Cherry Creek | Census-Designated Place | Arapahoe | ... | ... | 11,120 | o |
| Cherry Hills Village | City | Arapahoe | 5,279 | 5,962 | 5,987 | o |
| Cheyenne Wells | Town | Cheyenne | 1,128 | 1,010 | 846 | o |
| Cimarron Hills | Census-Designated Place | El Paso | 11,160 | 15,194 | 16,161 | o |
| City of Creede | Town | Mineral | 362 | 377 | 290 | o |
| Clifton | Census-Designated Place | Mesa | ... | ... | 19,889 | o |
| Coal Creek | Census-Designated Place | ... | 2,323 | 2,400 | o | |
| Coal Creek | Town | Fremont | 156 | 311 | 343 | o |
| Coaldale | Census-Designated Place | Fremont | ... | ... | 255 | o |
| Cokedale | Town | Las Animas | 116 | 139 | 129 | o |
| Collbran | Town | Mesa | 259 | 388 | 708 | o |
| Colona | Census-Designated Place | Ouray | ... | ... | 30 | o |
| Colorado City | Census-Designated Place | Pueblo | ... | ... | 2,193 | o |
| Colorado Springs | City | El Paso | 283,112 | 361,151 | 416,427 | o |
| Columbine | Census-Designated Place | 23,969 | 24,095 | 24,280 | o | |
| Columbine Valley | Town | Arapahoe | 1,086 | 1,146 | 1,256 | o |
| Comanche Creek | Census-Designated Place | Arapahoe | ... | ... | 369 | o |
| Commerce City | City | Adams | 16,771 | 20,950 | 45,913 | o |
| Conejos | Census-Designated Place | Conejos | ... | ... | 58 | o |
| Copper Mountain | Census-Designated Place | Summit | ... | ... | 385 | o |
| Cortez | City | Montezuma | 7,360 | 7,993 | 8,482 | o |
| Cotopaxi | Census-Designated Place | Fremont | ... | ... | 47 | o |
| Craig | City | Moffat | 8,107 | 9,193 | 9,464 | o |
| Crawford | Town | Delta | 199 | 359 | 431 | o |
| Crested Butte | Town | Gunnison | 865 | 1,529 | 1,487 | o |
| Crestone | Town | Saguache | ... | 88 | 127 | o |
| Cripple Creek | City | Teller | 580 | 1,115 | 1,189 | o |
| Crisman | Census-Designated Place | Boulder | ... | ... | 186 | o |
| Crook | Town | Logan | 159 | 128 | 110 | o |
| Crowley | Town | Crowley | 227 | 187 | 176 | o |
| Dacono | City | Weld | 2,259 | 3,058 | 4,152 | o |
| Dakota Ridge | Census-Designated Place | Jefferson | ... | ... | 32,005 | o |
| De Beque | Town | Mesa | ... | 472 | 504 | o |
| Deer Trail | Town | Arapahoe | 472 | 596 | 546 | o |
| Del Norte | Town | Rio Grande | ... | 1,879 | 1,686 | o |
| Delta | City | Delta | ... | 7,810 | 8,915 | o |
| Denver | City | Denver | 467,549 | 553,691 | 600,158 | o |
| Derby | Census-Designated Place | Adams | ... | ... | 7,685 | o |
| Dillon | Town | Summit | 553 | 822 | 904 | o |
| Dinosaur | Town | Moffat | 321 | 319 | 339 | o |
| Divide | Census-Designated Place | Teller | ... | ... | 127 | o |
| Dolores | Town | Montezuma | 866 | 862 | 936 | o |
| Dotsero | Census-Designated Place | Eagle | ... | ... | 705 | o |
| Dove Creek | Town | Dolores | 652 | 707 | 735 | o |
| Dove Valley | Census-Designated Place | Arapahoe | ... | ... | 5,243 | o |
| Downieville-Lawson-Dumont | Census-Designated Place | Clear Creek | ... | ... | 594 | o |
| Durango | City | La Plata | ... | 14,474 | 16,887 | o |
| Eads | Town | Kiowa | 784 | 747 | 609 | o |
| Eagle | Town | Eagle | 1,646 | 3,054 | 6,508 | o |
| East Pleasant View | Census-Designated Place | Jefferson | ... | ... | 356 | o |
| Eaton | Town | Weld | 2,044 | 2,751 | 4,365 | o |
| Eckley | Town | Yuma | 212 | 278 | 257 | o |
| Edgewater | City | Jefferson | 4,606 | 5,445 | 5,170 | o |
| Edwards | Census-Designated Place | Eagle | ... | ... | 10,266 | o |
| El Jebel | Census-Designated Place | Eagle | ... | ... | 3,801 | o |
| El Moro | Census-Designated Place | Las Animas | ... | ... | 221 | o |
| Elbert | Census-Designated Place | Elbert | ... | ... | 230 | o |
| Eldora | Census-Designated Place | Boulder | ... | 170 | 142 | o |
| Eldorado Springs | Census-Designated Place | Boulder | ... | ... | 585 | o |
| Elizabeth | Town | Elbert | 859 | 1,459 | 1,358 | o |
| Ellicott | Census-Designated Place | El Paso | ... | ... | 1,131 | o |
| Empire | Town | Clear Creek | 413 | 355 | 282 | o |
| Englewood | City | Arapahoe | 29,905 | 31,792 | 30,255 | o |
| Erie | Town | 1,263 | 6,358 | 18,135 | o | |
| Estes Park | Town | Larimer | 3,305 | 5,529 | 5,858 | o |
| Evans | City | Weld | ... | 10,140 | 18,537 | o |
| Evergreen | Census-Designated Place | Jefferson | ... | 9,216 | 9,038 | o |
| Fairmount | Census-Designated Place | Jefferson | ... | ... | 7,559 | o |
| Fairplay | Town | Park | 388 | 625 | 679 | o |
| Federal Heights | City | Adams | 9,341 | 12,067 | 11,467 | o |
| Firestone | Town | Weld | ... | 2,022 | 10,147 | o |
| Flagler | Town | Kit Carson | 547 | 615 | 561 | o |
| Fleming | Town | Logan | 350 | 426 | 408 | o |
| Florence | City | Fremont | 3,030 | 3,656 | 3,881 | o |
| Florissant | Census-Designated Place | Teller | ... | ... | 104 | o |
| Floyd Hill | Census-Designated Place | Clear Creek | ... | ... | 998 | o |
| Fort Carson | Census-Designated Place | El Paso | ... | ... | 13,813 | o |
| Fort Collins | City | Larimer | 88,899 | 119,412 | 143,986 | o |
| Fort Garland | Census-Designated Place | Costilla | ... | ... | 433 | o |
| Fort Lupton | City | Weld | ... | 7,171 | 7,377 | o |
| Fort Morgan | City | Morgan | 9,174 | 11,019 | 11,315 | o |
| Fountain | City | El Paso | 11,051 | 15,300 | 25,846 | o |
| Fowler | Town | Otero | 1,176 | 1,213 | 1,182 | o |
| Foxfield | Town | Arapahoe | ... | 719 | 685 | o |
| Franktown | Census-Designated Place | Douglas | ... | ... | 395 | o |
| Fraser | Town | Grand | ... | 950 | 1,224 | o |
| Frederick | Town | Weld | 1,100 | 2,540 | 8,679 | o |
| Frisco | Town | Summit | 1,619 | 2,473 | 2,683 | o |
| Fruita | City | Mesa | ... | 6,704 | 12,646 | o |
| Fruitvale | Census-Designated Place | Mesa | ... | ... | 7,675 | o |
| Fulford | Census-Designated Place | Eagle | ... | ... | 2 | o |
| Garden City | Town | Weld | 174 | 351 | 234 | o |
| Garfield | Census-Designated Place | Chaffee | ... | ... | 15 | o |
| Genesee | Census-Designated Place | Jefferson | 2,737 | 3,699 | 3,609 | o |
| Genoa | Town | Lincoln | 167 | 211 | 139 | o |
| Georgetown | Town | Clear Creek | 891 | 1,096 | 1,034 | o |
| Gerrard | Census-Designated Place | Rio Grande | ... | ... | 278 | o |
| Gilcrest | Town | Weld | 775 | 1,161 | 1,034 | o |
| Glendale | City | Arapahoe | 2,522 | 4,546 | 4,184 | o |
| Glendale | Census-Designated Place | Boulder | ... | ... | 69 | o |
| Gleneagle | Census-Designated Place | El Paso | ... | 4,246 | 6,611 | o |
| Glenwood Springs | City | Garfield | 6,576 | 7,791 | 9,614 | o |
| Gold Hill | Census-Designated Place | Boulder | ... | 210 | 230 | o |
| Golden | City | Jefferson | 12,914 | 17,177 | 18,867 | o |
| Goldfield | Census-Designated Place | Teller | ... | ... | 49 | o |
| Granada | Town | Prowers | 520 | 640 | 517 | o |
| Granby | Town | Grand | ... | 1,691 | 1,864 | o |
| Grand Junction | City | Mesa | ... | 45,482 | 58,566 | o |
| Grand Lake | Town | Grand | 267 | 443 | 471 | o |
| Grand View Estates | Census-Designated Place | Douglas | ... | ... | 528 | o |
| Greeley | City | Weld | 60,489 | 77,954 | 92,889 | o |
| Green Mountain Falls | Town | ... | 720 | 640 | o | |
| Greenwood Village | City | Arapahoe | ... | 11,411 | 13,925 | o |
| Grover | Town | Weld | 135 | 153 | 137 | o |
| Guffey | Census-Designated Place | Park | ... | ... | 98 | o |
| Gunbarrel | Census-Designated Place | Boulder | 9,388 | 9,435 | 9,263 | o |
| Gunnison | City | Gunnison | 4,621 | 5,411 | 5,854 | o |
| Gypsum | Town | Eagle | ... | 3,826 | 6,477 | o |
| Hartman | Town | Prowers | 110 | 111 | 81 | o |
| Hasty | Census-Designated Place | Bent | ... | ... | 144 | o |
| Haswell | Town | Kiowa | 61 | 84 | 68 | o |
| Haxtun | Town | Phillips | 968 | 985 | 946 | o |
| Hayden | Town | Routt | 1,445 | 1,652 | 1,810 | o |
| Heeney | Census-Designated Place | Summit | ... | ... | 76 | o |
| Hidden Lake | Census-Designated Place | Boulder | ... | ... | 31 | o |
| Highlands Ranch | Census-Designated Place | Douglas | ... | 70,931 | 96,713 | o |
| Hillrose | Town | Morgan | 169 | 254 | 264 | o |
| Hoehne | Census-Designated Place | Las Animas | ... | ... | 111 | o |
| Holly | Town | Prowers | 908 | 1,048 | 802 | o |
| Holly Hills | Census-Designated Place | Arapahoe | ... | ... | 2,521 | o |
| Holyoke | City | Phillips | 1,934 | 2,261 | 2,313 | o |
| Hooper | Town | Alamosa | 112 | 123 | 103 | o |
| Hot Sulphur Springs | Town | Grand | 344 | 529 | 663 | o |
| Hotchkiss | Town | Delta | ... | 1,010 | 944 | o |
| Howard | Census-Designated Place | Fremont | ... | ... | 723 | o |
| Hudson | Town | Weld | 961 | 1,583 | 2,356 | o |
| Hugo | Town | Lincoln | 623 | 885 | 730 | o |
| Idaho Springs | City | Clear Creek | 1,872 | 1,938 | 1,717 | o |
| Idalia | Census-Designated Place | Yuma | ... | ... | 88 | o |
| Idledale | Census-Designated Place | Jefferson | ... | ... | 252 | o |
| Ignacio | Town | La Plata | ... | 833 | 697 | o |
| Iliff | Town | Logan | 174 | 213 | 266 | o |
| Indian Hills | Census-Designated Place | Jefferson | ... | 1,197 | 1,280 | o |
| Inverness | Census-Designated Place | Arapahoe | ... | ... | 1,532 | o |
| Jackson Lake | Census-Designated Place | Morgan | ... | ... | 154 | o |
| Jamestown | Town | Boulder | ... | 217 | 274 | o |
| Jansen | Census-Designated Place | Las Animas | ... | ... | 112 | o |
| Joes | Census-Designated Place | Yuma | ... | ... | 80 | o |
| Johnson Village | Census-Designated Place | Chaffee | ... | ... | 246 | o |
| Johnstown | Town | Weld | ... | 4,405 | 9,887 | o |
| Julesburg | Town | Sedgwick | 1,279 | 1,475 | 1,225 | o |
| Keenesburg | Town | Weld | 549 | 872 | 1,127 | o |
| Ken Caryl | Census-Designated Place | Jefferson | 24,391 | 30,887 | 32,438 | o |
| Kersey | Town | Weld | 863 | 1,409 | 1,454 | o |
| Keystone | Census-Designated Place | Summit | ... | 825 | 1,079 | o |
| Kim | Town | Las Animas | 81 | 65 | 74 | o |
| Kiowa | Town | Elbert | 300 | 595 | 723 | o |
| Kirk | Census-Designated Place | Yuma | ... | ... | 59 | o |
| Kit Carson | Town | Cheyenne | 324 | 253 | 233 | o |
| Kittredge | Census-Designated Place | Jefferson | ... | 954 | 1,304 | o |
| Kremmling | Town | Grand | ... | 1,509 | 1,444 | o |
| La Jara | Town | Conejos | 793 | 886 | 818 | o |
| La Junta | City | Otero | 7,708 | 7,575 | 7,077 | o |
| La Junta Gardens | Census-Designated Place | Otero | ... | ... | 153 | o |
| La Salle | Town | Weld | 1,874 | 1,863 | 1,955 | o |
| La Veta | Town | Huerfano | 733 | 924 | 800 | o |
| Lafayette | City | Boulder | 14,866 | 23,187 | 24,453 | o |
| Laird | Census-Designated Place | Yuma | ... | ... | 47 | o |
| Lake City | Town | Hinsdale | 241 | 375 | 408 | o |
| Lakeside | Town | Jefferson | 11 | 20 | 8 | o |
| Lakewood | City | Jefferson | 126,156 | 144,370 | 142,980 | o |
| Lamar | City | Prowers | 8,392 | 8,869 | 7,804 | o |
| Laporte | Census-Designated Place | Larimer | ... | 2,691 | 2,450 | o |
| Larkspur | Town | Douglas | 214 | 236 | 183 | o |
| Las Animas | City | Bent | 2,520 | 2,760 | 2,410 | o |
| Lazy Acres | Census-Designated Place | Boulder | ... | ... | 920 | o |
| Leadville | City | Lake | 2,696 | 2,821 | 2,602 | o |
| Leadville North | Census-Designated Place | Lake | 1,757 | 1,942 | 1,794 | o |
| Lewis | Census-Designated Place | Montezuma | ... | ... | 302 | o |
| Leyner | Census-Designated Place | Boulder | ... | ... | 29 | o |
| Limon | Town | Lincoln | 1,892 | 2,071 | 1,880 | o |
| Lincoln Park | Census-Designated Place | Fremont | 3,728 | 3,904 | 3,546 | o |
| Littleton | City | 33,789 | 40,435 | 41,737 | o | |
| Lochbuie | Town | Weld | 1,168 | 2,068 | 4,726 | o |
| Log Lane Village | Town | Morgan | 768 | 1,015 | 873 | o |
| Loghill Village | Census-Designated Place | Ouray | ... | 311 | 521 | o |
| Loma | Census-Designated Place | Mesa | ... | ... | 1,293 | o |
| Lone Tree | City | Douglas | ... | 6,917 | 10,218 | o |
| Longmont | City | 52,214 | 71,248 | 86,270 | o | |
| Louisville | City | Boulder | 12,543 | 18,989 | 18,376 | o |
| Louviers | Census-Designated Place | Douglas | ... | ... | 269 | o |
| Loveland | City | Larimer | 37,511 | 51,308 | 66,859 | o |
| Lynn | Census-Designated Place | Las Animas | ... | ... | 12 | o |
| Lyons | Town | Boulder | 1,282 | 1,585 | 2,033 | o |
| Manassa | Town | Conejos | 1,042 | 1,042 | 991 | o |
| Mancos | Town | Montezuma | 839 | 1,120 | 1,336 | o |
| Manitou Springs | City | El Paso | 4,540 | 4,976 | 4,992 | o |
| Manzanola | Town | Otero | 451 | 525 | 434 | o |
| Marble | Town | Gunnison | 60 | 105 | 131 | o |
| Maybell | Census-Designated Place | Moffat | ... | ... | 72 | o |
| Maysville | Census-Designated Place | Chaffee | ... | ... | 135 | o |
| McCoy | Census-Designated Place | Eagle | ... | ... | 24 | o |
| Mead | Town | Weld | 467 | 1,983 | 3,405 | o |
| Meeker | Town | Rio Blanco | 2,110 | 2,242 | 2,475 | o |
| Meridian | Census-Designated Place | Douglas | ... | ... | 2,970 | o |
| Merino | Town | Logan | ... | 236 | 284 | o |
| Midland | Census-Designated Place | Teller | ... | ... | 156 | o |
| Milliken | Town | Weld | 1,636 | 2,952 | 5,610 | o |
| Minturn | Town | Eagle | 1,086 | 1,072 | 1,027 | o |
| Moffat | Town | Saguache | 67 | 114 | 116 | o |
| Monte Vista | City | Rio Grande | 4,357 | 4,590 | 4,444 | o |
| Montezuma | Town | Summit | 43 | 42 | 65 | o |
| Montrose | City | Montrose | ... | 12,928 | 19,132 | o |
| Monument | Town | El Paso | 1,047 | 1,975 | 5,530 | o |
| Morgan Heights | Census-Designated Place | Morgan | ... | ... | 266 | o |
| Morrison | Town | Jefferson | 517 | 430 | 428 | o |
| Mount Crested Butte | Town | Gunnison | 336 | 713 | 801 | o |
| Mountain Meadows | Census-Designated Place | Boulder | ... | ... | 274 | o |
| Mountain View | Town | Jefferson | 550 | 569 | 507 | o |
| Mountain Village | Town | San Miguel | 60 | 978 | 1,320 | o |
| Mulford | Census-Designated Place | Garfield | ... | ... | 174 | o |
| Naturita | Town | Montrose | 438 | 635 | 546 | o |
| Nederland | Town | Boulder | 1,106 | 1,391 | 1,445 | o |
| New Castle | Town | Garfield | 710 | 1,992 | 4,518 | o |
| Niwot | Census-Designated Place | Boulder | 2,666 | 4,160 | 4,006 | o |
| No Name | Census-Designated Place | Garfield | ... | ... | 123 | o |
| Norrie | Census-Designated Place | Pitkin | ... | ... | 7 | o |
| North La Junta | Census-Designated Place | Otero | ... | ... | 512 | o |
| North Washington | Census-Designated Place | Adams | ... | 549 | 484 | o |
| Northglenn | City | 27,287 | 32,223 | 35,789 | o | |
| Norwood | Town | San Miguel | 420 | 446 | 518 | o |
| Nucla | Town | Montrose | 647 | 736 | 711 | o |
| Nunn | Town | Weld | 370 | 471 | 416 | o |
| Oak Creek | Town | Routt | 664 | 849 | 884 | o |
| Olathe | Town | Montrose | 1,242 | 1,595 | 1,849 | o |
| Olney Springs | Town | Crowley | 340 | 389 | 345 | o |
| Ophir | Town | San Miguel | 69 | 113 | 159 | o |
| Orchard | Census-Designated Place | Morgan | ... | ... | 90 | o |
| Orchard City | Town | Delta | 2,140 | 2,885 | 3,119 | o |
| Orchard Mesa | Census-Designated Place | Mesa | ... | ... | 6,836 | o |
| Ordway | Town | Crowley | 1,033 | 1,248 | 1,080 | o |
| Otis | Town | Washington | 462 | 534 | 475 | o |
| Ouray | City | Ouray | 647 | 813 | 1,000 | o |
| Ovid | Town | Sedgwick | 333 | 330 | 318 | o |
| Padroni | Census-Designated Place | Logan | ... | 97 | 76 | o |
| Pagosa Springs | Town | Archuleta | 1,405 | 1,571 | 1,727 | o |
| Palisade | Town | Mesa | 1,943 | 2,579 | 2,692 | o |
| Palmer Lake | Town | El Paso | 1,477 | 2,179 | 2,420 | o |
| Paoli | Town | Phillips | 29 | 42 | 34 | o |
| Paonia | Town | Delta | 1,393 | 1,523 | 1,451 | o |
| Parachute | Town | Garfield | 661 | 1,007 | 1,085 | o |
| Paragon Estates | Census-Designated Place | Boulder | ... | ... | 928 | o |
| Parker | Town | Douglas | 5,625 | 23,630 | 45,297 | o |
| Parshall | Census-Designated Place | Grand | ... | ... | 47 | o |
| Peetz | Town | Logan | 169 | 227 | 238 | o |
| Penrose | Census-Designated Place | Fremont | ... | ... | 3,582 | o |
| Peoria | Census-Designated Place | Arapahoe | ... | ... | 163 | o |
| Perry Park | Census-Designated Place | Douglas | ... | ... | 1,646 | o |
| Peyton | Census-Designated Place | El Paso | ... | ... | 250 | o |
| Phippsburg | Census-Designated Place | Routt | ... | ... | 204 | o |
| Piedra | Census-Designated Place | Hinsdale | ... | ... | 28 | o |
| Pierce | Town | Weld | 822 | 884 | 834 | o |
| Pine Brook Hill | Census-Designated Place | Boulder | ... | ... | 983 | o |
| Pitkin | Town | Gunnison | 53 | 124 | 66 | o |
| Platteville | Town | Weld | 1,413 | 2,379 | 2,485 | o |
| Poncha Springs | Town | Chaffee | ... | 490 | 737 | o |
| Ponderosa Park | Census-Designated Place | Elbert | 1,640 | 3,112 | 3,232 | o |
| Portland | Census-Designated Place | Ouray | ... | ... | 135 | o |
| Pritchett | Town | Baca | 155 | 137 | 140 | o |
| Pueblo | City | Pueblo | 99,009 | 102,139 | 106,595 | o |
| Pueblo West | Census-Designated Place | Pueblo | ... | ... | 29,637 | o |
| Ramah | Town | El Paso | 108 | 117 | 123 | o |
| Rangely | Town | Rio Blanco | 2,372 | 2,100 | 2,365 | o |
| Raymer (New Raymer) | Town | Weld | 98 | 91 | 96 | o |
| Red Cliff | Town | Eagle | ... | 300 | 267 | o |
| Red Feather Lakes | Census-Designated Place | Larimer | ... | ... | 343 | o |
| Redlands | Census-Designated Place | Mesa | ... | ... | 8,685 | o |
| Redstone | Census-Designated Place | Pitkin | ... | ... | 130 | o |
| Redvale | Census-Designated Place | Montrose | ... | ... | 236 | o |
| Rico | Town | Dolores | 92 | 205 | 265 | o |
| Ridgway | Town | Ouray | ... | 743 | 924 | o |
| Rifle | City | Garfield | 5,432 | 6,847 | 9,172 | o |
| Rock Creek Park | Census-Designated Place | El Paso | ... | ... | 58 | o |
| Rockvale | Town | Fremont | 302 | 425 | 487 | o |
| Rocky Ford | City | Otero | 4,233 | 4,286 | 3,957 | o |
| Rollinsville | Census-Designated Place | Gilpin | ... | ... | 181 | o |
| Romeo | Town | Conejos | 337 | 375 | 404 | o |
| Roxborough Park | Census-Designated Place | Douglas | ... | ... | 9,099 | o |
| Rye | Town | Pueblo | 168 | 202 | 153 | o |
| Saddle Ridge | Census-Designated Place | Morgan | ... | ... | 56 | o |
| Saguache | Town | Saguache | 605 | 578 | 485 | o |
| Salida | City | Chaffee | 4,757 | 5,585 | 5,236 | o |
| Salt Creek | Census-Designated Place | Pueblo | ... | ... | 587 | o |
| San Acacio | Census-Designated Place | Costilla | ... | ... | 40 | o |
| San Luis | Town | Costilla | 808 | 739 | 629 | o |
| Sanford | Town | Conejos | 755 | 817 | 879 | o |
| Sawpit | Town | San Miguel | 33 | 25 | 40 | o |
| Security-Widefield | Census-Designated Place | El Paso | ... | ... | 32,882 | o |
| Sedalia | Census-Designated Place | Douglas | ... | 211 | 206 | o |
| Sedgwick | Town | Sedgwick | 182 | 191 | 146 | o |
| Segundo | Census-Designated Place | Las Animas | ... | ... | 98 | o |
| Seibert | Town | Kit Carson | 171 | 180 | 181 | o |
| Seven Hills | Census-Designated Place | Boulder | ... | ... | 121 | o |
| Severance | Town | Weld | ... | 658 | 3,165 | o |
| Shaw Heights | Census-Designated Place | Adams | ... | ... | 5,116 | o |
| Sheridan | City | Arapahoe | 4,985 | 5,534 | 5,664 | o |
| Sheridan Lake | Town | Kiowa | 94 | 66 | 88 | o |
| Sherrelwood | Census-Designated Place | Adams | 16,636 | 17,657 | 18,287 | o |
| Silt | Town | Garfield | 1,106 | 1,740 | 2,930 | o |
| Silver Cliff | Town | Custer | 319 | 512 | 587 | o |
| Silver Plume | Town | Clear Creek | 134 | 203 | 170 | o |
| Silverthorne | Town | Summit | 1,842 | 3,198 | 3,887 | o |
| Silverton | Town | San Juan | 716 | 531 | 637 | o |
| Simla | Town | Elbert | 499 | 663 | 618 | o |
| Smeltertown | Census-Designated Place | Chaffee | ... | ... | 120 | o |
| Snowmass Village | Town | Pitkin | 1,443 | 1,822 | 2,826 | o |
| Snyder | Census-Designated Place | Morgan | ... | ... | 132 | o |
| South Fork | Town | Rio Grande | 344 | 604 | 386 | o |
| Southern Ute | Census-Designated Place | La Plata | ... | ... | 177 | o |
| Springfield | Town | Baca | 1,507 | 1,572 | 1,451 | o |
| St. Ann Highlands | Census-Designated Place | Boulder | ... | ... | 288 | o |
| St. Mary's | Census-Designated Place | Clear Creek | ... | ... | 283 | o |
| Starkville | Town | Las Animas | 104 | 128 | 59 | o |
| Steamboat Springs | City | Routt | 6,751 | 9,937 | 12,088 | o |
| Sterling | City | Logan | ... | 12,785 | 14,777 | o |
| Stonegate | Census-Designated Place | Douglas | ... | 6,284 | 8,962 | o |
| Stonewall Gap | Census-Designated Place | Las Animas | ... | ... | 67 | o |
| Strasburg | Census-Designated Place | ... | ... | 2,447 | o | |
| Stratmoor | Census-Designated Place | El Paso | 5,854 | 6,650 | 6,900 | o |
| Stratton | Town | Kit Carson | 670 | 669 | 658 | o |
| Sugar City | Town | Crowley | 252 | 279 | 258 | o |
| Sugarloaf | Census-Designated Place | Boulder | ... | ... | 261 | o |
| Sunshine | Census-Designated Place | Boulder | ... | ... | 230 | o |
| Superior | Town | 276 | 9,008 | 12,483 | o | |
| Swink | Town | Otero | 588 | 696 | 617 | o |
| Tabernash | Census-Designated Place | Grand | ... | ... | 417 | o |
| Tall Timber | Census-Designated Place | Boulder | ... | ... | 208 | o |
| Telluride | Town | San Miguel | 1,345 | 2,253 | 2,325 | o |
| The Pinery | Census-Designated Place | Douglas | ... | ... | 10,517 | o |
| Thornton | City | 55,146 | 82,035 | 118,772 | o | |
| Timnath | Town | Larimer | ... | 288 | 625 | o |
| Todd Creek | Census-Designated Place | Adams | ... | ... | 3,768 | o |
| Towaoc | Census-Designated Place | Montezuma | 700 | 1,097 | 1,087 | o |
| Towner | Census-Designated Place | Kiowa | ... | ... | 22 | o |
| Trail Side | Census-Designated Place | Morgan | ... | ... | 59 | o |
| Trinidad | City | Las Animas | 8,650 | 9,096 | 9,096 | o |
| Twin Lakes | Census-Designated Place | Adams | ... | 6,301 | 6,101 | o |
| Twin Lakes | Census-Designated Place | Lake | ... | ... | 171 | o |
| Two Buttes | Town | Baca | 63 | 67 | 43 | o |
| Upper Bear Creek | Census-Designated Place | Clear Creek | ... | ... | 1,059 | o |
| Vail | Town | Eagle | 3,740 | 4,630 | 5,305 | o |
| Valdez | Census-Designated Place | Las Animas | ... | ... | 47 | o |
| Valmont | Census-Designated Place | Boulder | ... | ... | 59 | o |
| Vernon | Census-Designated Place | Yuma | ... | ... | 29 | o |
| Victor | City | Teller | 270 | 445 | 397 | o |
| Vilas | Town | Baca | 105 | 110 | 114 | o |
| Vineland | Census-Designated Place | Pueblo | ... | ... | 251 | o |
| Vona | Town | Kit Carson | 95 | 95 | 106 | o |
| Walden | Town | Jackson | 857 | 734 | 608 | o |
| Walsenburg | City | Huerfano | 3,313 | 4,182 | 3,068 | o |
| Walsh | Town | Baca | 710 | 715 | 546 | o |
| Ward | Town | Boulder | 150 | 169 | 150 | o |
| Watkins | Census-Designated Place | Arapahoe | ... | ... | 653 | o |
| Welby | Census-Designated Place | Adams | 10,218 | 12,973 | 14,846 | o |
| Weldona | Census-Designated Place | Morgan | ... | ... | 139 | o |
| Wellington | Town | Larimer | 1,197 | 2,674 | 6,289 | o |
| West Pleasant View | Census-Designated Place | Jefferson | ... | 3,932 | 3,840 | o |
| Westcliffe | Town | Custer | 313 | 417 | 568 | o |
| Westcreek | Census-Designated Place | Douglas | ... | ... | 129 | o |
| Westminster | City | 74,176 | 100,977 | 106,114 | o | |
| Weston | Census-Designated Place | Las Animas | ... | ... | 55 | o |
| Wheat Ridge | City | Jefferson | 29,420 | 32,915 | 30,166 | o |
| Wiggins | Town | Morgan | 522 | 852 | 893 | o |
| Wiley | Town | Prowers | 389 | 483 | 405 | o |
| Williamsburg | Town | Fremont | 253 | 708 | 662 | o |
| Windsor | Town | 5,238 | 10,095 | 18,644 | o | |
| Winter Park | Town | Grand | 528 | 668 | 999 | o |
| Wolcott | Census-Designated Place | Eagle | ... | ... | 15 | o |
| Woodland Park | City | Teller | ... | 6,783 | 7,200 | o |
| Woodmoor | Census-Designated Place | El Paso | 3,858 | 7,177 | 8,741 | o |
| Woody Creek | Census-Designated Place | Pitkin | ... | ... | 263 | o |
| Wray | City | Yuma | 2,023 | 2,194 | 2,342 | o |
| Yampa | Town | Routt | 297 | 443 | 429 | o |
| Yuma | City | Yuma | 2,684 | 3,291 | 3,524 | o |
Source: US Census Bureau (web).
2011-04-03WWW.CITYPOPULATION.DE