Counties in Colorado
Each county page says how cases move there under Colorado's rules, and lists the police agencies that serve it.
64 counties, largest first
- El Paso County757,040 people · 11 agencies
- Denver County740,613 people · 6 agencies
- Arapahoe County673,820 people · 13 agencies
- Jefferson County580,451 people · 15 agencies
- Adams County554,668 people · 11 agencies
- Douglas County399,396 people · 6 agencies
- Weld County378,426 people · 33 agencies
- Larimer County377,292 people · 11 agencies
- Boulder County328,560 people · 10 agencies
- Pueblo County169,277 people · 4 agencies
- Mesa County162,845 people · 7 agencies
- Broomfield County79,174 people · 1 agencies
- Garfield County63,474 people · 8 agencies
- La Plata County56,898 people · 6 agencies
- Eagle County54,291 people · 7 agencies
- Fremont County50,039 people · 3 agencies
- Montrose County44,591 people · 6 agencies
- Delta County32,178 people · 5 agencies
- Summit County31,517 people · 7 agencies
- Elbert County30,534 people · 4 agencies
- Morgan County30,306 people · 5 agencies
- Montezuma County26,678 people · 5 agencies
- Routt County25,329 people · 5 agencies
- Teller County24,756 people · 6 agencies
- Chaffee County20,831 people · 3 agencies
- Logan County20,654 people · 3 agencies
- Park County18,314 people · 3 agencies
- Otero County17,683 people · 5 agencies
- Gunnison County17,439 people · 4 agencies
- Alamosa County16,688 people · 3 agencies
- Pitkin County16,625 people · 4 agencies
- Grand County16,496 people · 5 agencies
- Las Animas County14,391 people · 2 agencies
- Archuleta County14,306 people · 2 agencies
- Moffat County13,122 people · 3 agencies
- Prowers County11,884 people · 4 agencies
- Rio Grande County11,087 people · 5 agencies
- Yuma County9,896 people · 3 agencies
- Clear Creek County8,994 people · 4 agencies
- San Miguel County7,753 people · 4 agencies
- Lake County7,552 people · 2 agencies
- Conejos County7,529 people · 6 agencies
- Kit Carson County7,069 people · 4 agencies
- Huerfano County7,011 people · 3 agencies
- Saguache County6,732 people · 3 agencies
- Rio Blanco County6,683 people · 3 agencies
- Gilpin County6,073 people · 3 agencies
- Bent County5,716 people · 2 agencies
- Crowley County5,677 people · 2 agencies
- Lincoln County5,645 people · 3 agencies
- Custer County5,590 people · 2 agencies
- Ouray County5,265 people · 3 agencies
- Washington County4,732 people · 3 agencies
- Phillips County4,420 people · 3 agencies
- Costilla County3,679 people · 2 agencies
- Baca County3,347 people · 5 agencies
- Dolores County2,466 people · 2 agencies
- Sedgwick County2,247 people · 2 agencies
- Cheyenne County1,713 people · 2 agencies
- Kiowa County1,412 people · 2 agencies
- Jackson County1,211 people · 1 agencies
- Mineral County910 people · 2 agencies
- San Juan County813 people · 2 agencies
- Hinsdale County753 people · 1 agencies
Population: Census Bureau county population estimates, Vintage 2025 (cc-est2025-alldata), July 1, 2025.