First-level division
🇺🇸 Colorado
Subdivisions
Arapahoe
Population 655,070
El Paso
Population 622,263
Denver
Population 600,158
Jefferson
Population 582,910
Adams
Population 519,572
Larimer
Population 359,066
Douglas
Population 357,978
Boulder
Population 330,758
Weld
Population 328,981
Pueblo
Population 168,162
Mesa
Population 155,703
City and County of Broomfield
Population 74,112
Garfield
Population 61,685
Eagle
Population 55,731
La Plata
Population 51,334
Fremont
Population 48,939
Montrose
Population 42,679
Delta
Population 31,196
Summit
Population 31,055
Morgan
Population 29,111
Elbert
Population 26,062
Montezuma
Population 25,849
Routt
Population 24,829
Teller
Population 24,710
Logan
Population 21,528
Chaffee
Population 19,476
Otero
Population 18,690
Park
Population 17,390
Pitkin
Population 17,358
Gunnison
Population 16,918
Alamosa
Population 16,376
Grand
Population 15,717
Las Animas
Population 14,555
Archuleta
Population 13,359
Moffat
Population 13,292
Prowers
Population 11,999
Rio Grande
Population 11,982
Yuma
Population 9,988
Clear Creek
Population 9,088
Kit Carson
Population 8,270
Conejos
Population 7,461
Lake
Population 7,436
San Miguel
Population 7,359
Huerfano
Population 6,820
Rio Blanco
Population 6,529
Saguache
Population 6,368
Crowley
Population 5,922
Custer
Population 5,922
Gilpin
Population 5,808
Lincoln
Population 5,675
Bent
Population 5,650
Ouray
Population 4,874
Washington
Population 4,817
Phillips
Population 4,530
Baca
Population 3,506
Costilla
Population 3,499
Sedgwick
Population 2,404
Dolores
Population 2,326
Cheyenne
Population 1,748
Kiowa
Population 1,446
Jackson
Population 1,379
Mineral
Population 865
Hinsdale
Population 788
San Juan
Population 699