Colorado — All 64 Counties

Colorado has 64 counties with 479 communities and a combined population of 5,047,527.

CountyTownsPopulation
Adams County201,019,457
Denver County1713,734
El Paso County20653,685
Larimer County10340,626
Boulder County33327,091
Douglas County22322,666
Jefferson County19322,527
Arapahoe County22296,742
Weld County24228,010
Pueblo County10151,579
Mesa County10128,572
Broomfield County175,110
Eagle County1247,682
Garfield County1344,423
Fremont County1135,243
Montrose County524,050
La Plata County523,591
Morgan County1320,219
Delta County718,038
Routt County516,744
Summit County916,209
Logan County815,015
Otero County813,884
Montezuma County512,268
Alamosa County311,419
Chaffee County810,221
Pitkin County510,190
Las Animas County149,745
Teller County79,727
Moffat County39,674
Gunnison County69,340
Prowers County59,164
Rio Grande County69,139
Clear Creek County148,946
Grand County88,102
Elbert County66,700
Yuma County86,320
San Miguel County65,357
Rio Blanco County25,100
Kit Carson County65,082
Lake County34,608
Conejos County73,906
Huerfano County33,889
Phillips County43,484
Ouray County53,129
Crowley County43,019
Lincoln County42,945
Bent County32,648
Baca County62,327
Washington County32,318
Archuleta County22,114
Sedgwick County31,725
Costilla County41,357
Custer County21,242
Cheyenne County31,202
Park County41,122
Dolores County21,072
Kiowa County5797
Jackson County1658
Saguache County4654
San Juan County1613
Hinsdale County3550
Gilpin County2450
Mineral County1307