# Counties in Colorado by population, 2025

All 64 values come from U.S. Census Bureau for 2025, so the places are comparable.

- Indicator id: `population`
- Unit: persons
- Definition: Resident population. Spain and the EU: 1 January, with Spanish figures from the official municipal register (Padrón). United States: Census Bureau population estimates for 1 July. Other countries and the World: World Bank mid-year estimates, which count all residents regardless of legal status or citizenship.
- Source: U.S. Census Bureau, Annual estimates of the resident population for the United States, states and counties, 1 July (Population Estimates Program) (https://www2.census.gov/programs-surveys/popest/datasets/2020-2025/)
- Retrieved: 2026-10-08
- Citation: U.S. Census Bureau. Annual estimates of the resident population for the United States, states and counties, 1 July (Population Estimates Program). https://www2.census.gov/programs-surveys/popest/datasets/2020-2025/. Retrieved 2026-10-08.
- Web page: https://invokely.ai/rankings/population/colorado-counties
- CSV: https://invokely.ai/download/rankings/population/colorado-counties.csv

| Rank | Place | persons |
|---:|---|---:|
| 1 | El Paso County | 757,040 |
| 2 | Denver County | 740,613 |
| 3 | Arapahoe County | 673,820 |
| 4 | Jefferson County | 580,451 |
| 5 | Adams County | 554,668 |
| 6 | Douglas County | 399,396 |
| 7 | Weld County | 378,426 |
| 8 | Larimer County | 377,292 |
| 9 | Boulder County | 328,560 |
| 10 | Pueblo County | 169,277 |
| 11 | Mesa County | 162,845 |
| 12 | Broomfield County | 79,174 |
| 13 | Garfield County | 63,474 |
| 14 | La Plata County | 56,898 |
| 15 | Eagle County | 54,291 |
| 16 | Fremont County | 50,039 |
| 17 | Montrose County | 44,591 |
| 18 | Delta County | 32,178 |
| 19 | Summit County | 31,517 |
| 20 | Elbert County | 30,534 |
| 21 | Morgan County | 30,306 |
| 22 | Montezuma County | 26,678 |
| 23 | Routt County | 25,329 |
| 24 | Teller County | 24,756 |
| 25 | Chaffee County | 20,831 |
| 26 | Logan County | 20,654 |
| 27 | Park County | 18,314 |
| 28 | Otero County | 17,683 |
| 29 | Gunnison County | 17,439 |
| 30 | Alamosa County | 16,688 |
| 31 | Pitkin County | 16,625 |
| 32 | Grand County | 16,496 |
| 33 | Las Animas County | 14,391 |
| 34 | Archuleta County | 14,306 |
| 35 | Moffat County | 13,122 |
| 36 | Prowers County | 11,884 |
| 37 | Rio Grande County | 11,087 |
| 38 | Yuma County | 9,896 |
| 39 | Clear Creek County | 8,994 |
| 40 | San Miguel County | 7,753 |
| 41 | Lake County | 7,552 |
| 42 | Conejos County | 7,529 |
| 43 | Kit Carson County | 7,069 |
| 44 | Huerfano County | 7,011 |
| 45 | Saguache County | 6,732 |
| 46 | Rio Blanco County | 6,683 |
| 47 | Gilpin County | 6,073 |
| 48 | Bent County | 5,716 |
| 49 | Crowley County | 5,677 |
| 50 | Lincoln County | 5,645 |
| 51 | Custer County | 5,590 |
| 52 | Ouray County | 5,265 |
| 53 | Washington County | 4,732 |
| 54 | Phillips County | 4,420 |
| 55 | Costilla County | 3,679 |
| 56 | Baca County | 3,347 |
| 57 | Dolores County | 2,466 |
| 58 | Sedgwick County | 2,247 |
| 59 | Cheyenne County | 1,713 |
| 60 | Kiowa County | 1,412 |
| 61 | Jackson County | 1,211 |
| 62 | Mineral County | 910 |
| 63 | San Juan County | 813 |
| 64 | Hinsdale County | 753 |