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 DenverâÂÂAuroraâÂÂGreeley, CO Combined Statistical Area with a United States Census Bureau estimated population of 3,752,505 as of July 1, 2024.
The DenverâÂÂAuroraâÂÂGreeley, CO Combined Statistical Area, the Colorado Springs, CO Metropolitan Statistical Area, the Fort CollinsâÂÂLoveland, 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.
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, 2024.
The following table provides the in-state population rank of each of the 17 Colorado core-based statistical areas with their population histories.
The following table provides the in-state population rank of each of the three Colorado combined statistical areas with their population histories.