Population of Counties in Colorado (2018)

Name 2018 Population Growth Rate
Denver County694,77715.18%
El Paso County686,7069.55%
Arapahoe County636,94910.84%
Jefferson County570,8396.55%
Adams County497,39512.11%
Larimer County338,53112.68%
Douglas County327,72214.21%
Boulder County321,1738.53%
Weld County294,24315.76%
Pueblo County164,8343.37%
Mesa County149,7942.30%
Broomfield County66,50918.31%
Garfield County58,9065.01%
La Plata County55,2167.55%
Eagle County54,3644.34%
Fremont County46,9060.16%
Montrose County41,160-0.07%
Delta County30,346-1.66%
Summit County30,3328.07%
Morgan County28,063-0.61%
Montezuma County25,9751.56%
Elbert County25,0418.22%
Routt County24,6795.26%
Teller County24,0402.45%
Logan County21,925-0.97%
Chaffee County19,0827.17%
Otero County18,239-3.42%
Pitkin County17,8944.30%
Park County17,3506.60%
Gunnison County16,4917.40%
Alamosa County16,4563.26%
Grand County15,1292.26%
Las Animas County14,087-8.59%
Moffat County13,161-4.62%
Archuleta County12,8366.57%
Prowers County11,989-4.63%
Rio Grande County11,338-5.71%
Yuma County10,1180.66%
Clear Creek County9,3613.06%
Conejos County8,072-2.89%
San Miguel County7,9648.27%
Kit Carson County7,628-7.70%
Lake County7,6064.68%
Huerfano County6,582-1.45%
Rio Blanco County6,483-2.77%
Saguache County6,4074.42%
Gilpin County5,9058.11%
Bent County5,681-12.61%
Lincoln County5,5621.63%
Crowley County5,254-10.34%
Washington County4,8460.48%
Ouray County4,7847.58%
Custer County4,6017.42%
Phillips County4,281-4.27%
Costilla County3,7054.99%
Baca County3,548-6.83%
Sedgwick County2,4051.56%
Dolores County2,062-0.34%
Cheyenne County1,8340.11%
Jackson County1,360-2.16%
Kiowa County1,348-3.99%
Hinsdale County787-6.75%
Mineral County7557.24%
San Juan County689-2.68%