Population of Counties in Colorado (2017)

Name 2017 Population Growth Rate
Denver County693,06014.87%
El Paso County688,2849.78%
Arapahoe County637,06810.84%
Jefferson County571,8376.70%
Adams County498,18712.28%
Larimer County339,99313.13%
Douglas County328,63214.51%
Boulder County322,2268.87%
Weld County294,93216.04%
Pueblo County165,1233.51%
Mesa County150,0832.46%
Broomfield County66,52918.22%
Garfield County58,8874.98%
La Plata County55,6238.27%
Eagle County53,9893.66%
Fremont County47,4461.26%
Montrose County41,4710.67%
Delta County30,442-1.42%
Summit County30,3748.23%
Morgan County28,2740.36%
Montezuma County26,9995.66%
Elbert County25,2319.25%
Routt County24,6485.12%
Teller County24,0432.54%
Logan County21,919-0.94%
Chaffee County19,0587.05%
Otero County18,295-3.11%
Pitkin County17,7523.46%
Park County17,1665.55%
Alamosa County16,6544.56%
Gunnison County16,4086.84%
Grand County15,0081.53%
Las Animas County14,103-8.37%
Moffat County13,109-5.09%
Archuleta County12,8546.63%
Prowers County11,922-5.06%
Rio Grande County11,479-4.50%
Yuma County10,1030.79%
Clear Creek County9,4363.91%
Kit Carson County8,195-0.63%
Conejos County8,129-1.97%
San Miguel County8,0178.96%
Lake County7,6184.83%
Huerfano County6,6770.15%
Rio Blanco County6,545-1.84%
Saguache County6,3894.12%
Gilpin County5,9318.61%
Bent County5,861-9.94%
Crowley County5,694-2.70%
Lincoln County5,6433.16%
Washington County4,9082.21%
Ouray County4,8578.76%
Custer County4,6027.65%
Phillips County4,288-3.92%
Costilla County3,7215.53%
Baca County3,568-5.86%
Sedgwick County2,4071.56%
Dolores County2,056-0.44%
Cheyenne County1,8480.93%
Kiowa County1,373-1.65%
Jackson County1,357-2.02%
Hinsdale County788-6.64%
Mineral County7323.98%
San Juan County694-1.98%