The U.S. State of Colorado has 20 statistical areas that have been delineated by the Office of Management and Budget (OMB). Statistical areas are important geographic delineations of population clusters used by the OMB, the United States Census Bureau, planning organizations, and federal, state, and local government entities.
On July 21, 2023, the OMB delineated three combined statistical areas, seven metropolitan statistical areas, and ten micropolitan statistical areas in Colorado. The most populous of these statistical areas is the 12-county Denver–Aurora–Greeley, CO Combined Statistical Area with a United States Census Bureau estimated population of 3,752,505 as of July 1, 2024.
The Denver–Aurora–Greeley, CO Combined Statistical Area, the Colorado Springs, CO Metropolitan Statistical Area, the Fort Collins–Loveland, CO Metropolitan Statistical Area, the Pueblo-Cañon City, CO Combined Statistical Area, and the Cheyenne, WY Metropolitan Statistical Area comprise what is known as the Front Range Urban Corridor.
Colorado statistical areas
The following table contains each of the 64 Colorado counties with their statistical areas and their population as estimated by the United States Census Bureau for July 1, 2025.
+The 64 counties and 20 statistical areas of the State of Colorado64 counties17 core-based statistical areas3 combined statistical areascounty2025 population estimateCBSA2025 population estimateCSA2025 population estimateCity and County of Denver740,613Denver-Aurora-Centennial, CO MSA3,092,037Denver-Aurora-Greeley, CO CSA3,799,023Arapahoe County673,820Jefferson County580,451Adams County554,668Douglas County399,396City and County of Broomfield79,174Elbert County30,534Park County18,314Clear Creek County8,994Gilpin County6,073Weld County378,426Greeley, CO MSA378,426Boulder County328,560Boulder, CO MSA328,560El Paso County757,040Colorado Springs, CO MSA781,796noneTeller County24,756Larimer County377,292Fort Collins-Loveland, CO MSA377,292Pueblo County169,277Pueblo, CO MSA169,277Pueblo-Cañon City, CO CSA219,316Fremont County50,039Cañon City, CO μSA50,039Mesa County162,845Grand Junction, CO MSA162,845noneGarfield County63,474Rifle, CO μSA80,099Edwards-Rifle, CO CSA134,390Pitkin County16,625Eagle County54,291Edwards, CO μSA54,291La Plata County56,898Durango, CO μSA56,898noneMontrose County44,591Montrose, CO μSA44,591Routt County25,329Steamboat Springs, CO μSA38,451Moffat County13,122Summit County31,517Breckenridge, CO μSA39,069Lake County7,552Morgan County30,306Fort Morgan, CO μSA30,306Alamosa County16,688Alamosa, CO μSA27,896Conejos County7,529Costilla County3,679Logan County20,654Sterling, CO μSA20,654Delta County32,178noneMontezuma County26,678Chaffee County20,831Otero County17,683Gunnison County17,439Grand County16,496Las Animas County14,391Archuleta County14,306Prowers County11,884Rio Grande County11,087Yuma County9,896San Miguel County7,753Kit Carson County7,069Huerfano County7,011Saguache County6,732Rio Blanco County6,683Bent County5,716Crowley County5,677Lincoln County5,645Custer County5,590Ouray County5,265Washington County4,732Phillips County4,420Baca County3,347Dolores County2,466Sedgwick County2,247Cheyenne County1,713Kiowa County1,412Jackson County1,211Mineral County910San Juan County813Hinsdale County753All 64 Colorado counties6,012,561The 17 Colorado statistical areas5,732,527The 3 Colorado combined statistical areas4,152,729
Colorado core-based statistical areas The following table provides the in-state population rank of each of the 17 Colorado core-based statistical areas with their population histories.
+The 17 core-based statistical areas of the State of Colorado2025 rankCore-based statistical areaPopulation2025 estimateChange2020 CensusChange2010 CensusChange2000 Census1Denver-Aurora-Centennial, CO MSA2Colorado Springs, CO MSA3Greeley, CO MSA4Fort Collins-Loveland, CO MSA5Boulder, CO MSA6Pueblo, CO MSA7Grand Junction, CO MSA8Rifle, CO μSA9Durango, CO μSA10Edwards, CO μSA11Cañon City, CO μSA12Montrose, CO μSA13Steamboat Springs, CO μSA14Breckenridge, CO μSA15Fort Morgan, CO μSA16Alamosa, CO μSA17Sterling, CO μSAThe 17 Colorado statistical areas
Colorado combined statistical areas The following table provides the in-state population rank of each of the three Colorado combined statistical areas with their population histories.
+The three combined statistical areas of the State of Colorado2025 rankCombined statistical areaPopulation2025 estimateChange2020 CensusChange2010 CensusChange2000 CensusDenver-Aurora-Greeley, CO CSAPueblo-Cañon City, CO CSAEdwards-Rifle, CO CSAThe 3 Colorado combined statistical areas
See also
Bibliography of Colorado Geography of Colorado History of Colorado Index of Colorado-related articles List of Colorado-related lists List of counties in Colorado List of Colorado counties by per capita income List of Colorado counties by population List of Colorado counties by socioeconomic factors List of Colorado county high points List of Colorado municipalities by county List of Colorado populated places by county List of county courthouses in Colorado List of county seats in Colorado Outline of Colorado
Notes
References
External links
Office of Management and Budget United States Census Bureau State of Colorado