Colorado 2020 Census Total Population By County
The total population of Colorado from the 2020 Census was 5,773,714, based on data from the US Census Bureau.
El Paso County was the most populated county (730,395), followed by Denver County (715,522), and then Arapahoe County (655,070). On the other hand, the 3 counties that were least populated include: San Juan County (705), Hinsdale County (788), and Mineral County (865).
You can also see this information for other states and also for the US by state.
Hover over or click on the counties to see the number and percentage of Colorado population that lives in each county. The data can also be found in a table below. You can use the table to sort, filter, and explore the data further.
You can also see the population by county for the different racial groups as well as the different ethnicities in Colorado.
| County | Population | % of Colorado Pop. |
|---|---|---|
| Adams | 519572 | 9.00 |
| Alamosa | 16376 | 0.28 |
| Arapahoe | 655070 | 11.35 |
| Archuleta | 13359 | 0.23 |
| Baca | 3506 | 0.06 |
| Bent | 5650 | 0.10 |
| Boulder | 330758 | 5.73 |
| Broomfield | 74112 | 1.28 |
| Chaffee | 19476 | 0.34 |
| Cheyenne | 1748 | 0.03 |
| Clear Creek | 9397 | 0.16 |
| Conejos | 7461 | 0.13 |
| Costilla | 3499 | 0.06 |
| Crowley | 5922 | 0.10 |
| Custer | 4704 | 0.08 |
| Delta | 31196 | 0.54 |
| Denver | 715522 | 12.39 |
| Dolores | 2326 | 0.04 |
| Douglas | 357978 | 6.20 |
| Eagle | 55731 | 0.97 |
| Elbert | 26062 | 0.45 |
| El Paso | 730395 | 12.65 |
| Fremont | 48939 | 0.85 |
| Garfield | 61685 | 1.07 |
| Gilpin | 5808 | 0.10 |
| Grand | 15717 | 0.27 |
| Gunnison | 16918 | 0.29 |
| Hinsdale | 788 | 0.01 |
| Huerfano | 6820 | 0.12 |
| Jackson | 1379 | 0.02 |
| Jefferson | 582910 | 10.10 |
| Kiowa | 1446 | 0.03 |
| Kit Carson | 7087 | 0.12 |
| Lake | 7436 | 0.13 |
| La Plata | 55638 | 0.96 |
| Larimer | 359066 | 6.22 |
| Las Animas | 14555 | 0.25 |
| Lincoln | 5675 | 0.10 |
| Logan | 21528 | 0.37 |
| Mesa | 155703 | 2.70 |
| Mineral | 865 | 0.02 |
| Moffat | 13292 | 0.23 |
| Montezuma | 25849 | 0.45 |
| Montrose | 42679 | 0.74 |
| Morgan | 29111 | 0.50 |
| Otero | 18690 | 0.32 |
| Ouray | 4874 | 0.08 |
| Park | 17390 | 0.30 |
| Phillips | 4530 | 0.08 |
| Pitkin | 17358 | 0.30 |
| Prowers | 11999 | 0.21 |
| Pueblo | 168162 | 2.91 |
| Rio Blanco | 6529 | 0.11 |
| Rio Grande | 11539 | 0.20 |
| Routt | 24829 | 0.43 |
| Saguache | 6368 | 0.11 |
| San Juan | 705 | 0.01 |
| San Miguel | 8072 | 0.14 |
| Sedgwick | 2404 | 0.04 |
| Summit | 31055 | 0.54 |
| Teller | 24710 | 0.43 |
| Washington | 4817 | 0.08 |
| Weld | 328981 | 5.70 |
| Yuma | 9988 | 0.17 |