# List of statistical areas in Colorado

The 17 core-based statistical areas in Colorado.
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 Denver–Aurora–Greeley, CO Combined Statistical Area with a United States Census Bureau estimated population of 3,752,505 as of July 1, 2024.

## Statistical areas

The Office of Management and Budget (OMB) has designated more than 1,000 statistical areas for the United States and Puerto Rico. These 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.
The OMB defines a core-based statistical area (commonly referred to as a CBSA) as the county or counties (or county-equivalents) surrounding at least one densely-settled core of at least 10,000 population, "plus adjacent counties having a high degree of social and economic integration with the core as measured through commuting ties with the counties containing the core". The OMB further divides core-based statistical areas based on population into metropolitan statistical areas (MSAs) for those with at least 50,000 and micropolitan statistical areas (μSAs) for those with 10,000 to 49,999 people.
The OMB defines a combined statistical area (CSA) as two or more adjacent core-based statistical areas where the employment interchange rate (% commuting from A to B plus % commuting from B to A) is at least 15%. The primary statistical areas (PSAs) include all combined statistical areas and any core-based statistical area that is not a constituent of a combined statistical area.

## 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, 2024.
The 64 counties and 20 statistical areas of the State of Colorado :
| 64 counties | 64 counties | 17 core-based statistical areas | 17 core-based statistical areas | 3 combined statistical areas | 3 combined statistical areas |
| county | 2024 population estimate | CBSA | 2024 population estimate | CSA | 2024 population estimate |
| City and County of Denver | 729,019 | Denver-Aurora-Centennial, CO MSA | 3,052,498 | Denver-Aurora-Greeley, CO CSA | 3,752,505 |
| Arapahoe County | 666,918 | Denver-Aurora-Centennial, CO MSA | 3,052,498 | Denver-Aurora-Greeley, CO CSA | 3,752,505 |
| Jefferson County | 578,533 | Denver-Aurora-Centennial, CO MSA | 3,052,498 | Denver-Aurora-Greeley, CO CSA | 3,752,505 |
| Adams County | 542,973 | Denver-Aurora-Centennial, CO MSA | 3,052,498 | Denver-Aurora-Greeley, CO CSA | 3,752,505 |
| Douglas County | 393,995 | Denver-Aurora-Centennial, CO MSA | 3,052,498 | Denver-Aurora-Greeley, CO CSA | 3,752,505 |
| City and County of Broomfield | 78,323 | Denver-Aurora-Centennial, CO MSA | 3,052,498 | Denver-Aurora-Greeley, CO CSA | 3,752,505 |
| Elbert County | 29,382 | Denver-Aurora-Centennial, CO MSA | 3,052,498 | Denver-Aurora-Greeley, CO CSA | 3,752,505 |
| Park County | 18,316 | Denver-Aurora-Centennial, CO MSA | 3,052,498 | Denver-Aurora-Greeley, CO CSA | 3,752,505 |
| Clear Creek County | 9,076 | Denver-Aurora-Centennial, CO MSA | 3,052,498 | Denver-Aurora-Greeley, CO CSA | 3,752,505 |
| Gilpin County | 5,963 | Denver-Aurora-Centennial, CO MSA | 3,052,498 | Denver-Aurora-Greeley, CO CSA | 3,752,505 |
| Weld County | 369,745 | Greeley, CO MSA | 369,745 | Denver-Aurora-Greeley, CO CSA | 3,752,505 |
| Boulder County | 330,262 | Boulder, CO MSA | 330,262 | Denver-Aurora-Greeley, CO CSA | 3,752,505 |
| El Paso County | 752,772 | Colorado Springs, CO MSA | 777,634 | none | none |
| Teller County | 24,862 | Colorado Springs, CO MSA | 777,634 | none | none |
| Larimer County | 374,574 | Fort Collins-Loveland, CO MSA | 374,574 | none | none |
| Pueblo County | 169,866 | Pueblo, CO MSA | 169,866 | Pueblo-Cañon City, CO CSA | 219,959 |
| Fremont County | 50,093 | Cañon City, CO μSA | 50,093 | Pueblo-Cañon City, CO CSA | 219,959 |
| Mesa County | 161,260 | Grand Junction, CO MSA | 161,260 | none | none |
| Garfield County | 63,167 | Rifle, CO μSA | 79,810 | Edwards-Rifle, CO CSA | 134,140 |
| Pitkin County | 16,643 | Rifle, CO μSA | 79,810 | Edwards-Rifle, CO CSA | 134,140 |
| Eagle County | 54,330 | Edwards, CO μSA | 54,330 | Edwards-Rifle, CO CSA | 134,140 |
| La Plata County | 56,823 | Durango, CO μSA | 56,823 | none | none |
| Montrose County | 44,806 | Montrose, CO μSA | 44,806 | none | none |
| Routt County | 25,243 | Steamboat Springs, CO μSA | 38,385 | none | none |
| Moffat County | 13,142 | Steamboat Springs, CO μSA | 38,385 | none | none |
| Summit County | 30,882 | Breckenridge, CO μSA | 38,251 | none | none |
| Lake County | 7,369 | Breckenridge, CO μSA | 38,251 | none | none |
| Morgan County | 30,300 | Fort Morgan, CO μSA | 30,300 | none | none |
| Alamosa County | 16,689 | Alamosa, CO μSA | 27,924 | none | none |
| Conejos County | 7,549 | Alamosa, CO μSA | 27,924 | none | none |
| Costilla County | 3,686 | Alamosa, CO μSA | 27,924 | none | none |
| Logan County | 20,755 | Sterling, CO μSA | 20,755 | none | none |
| Delta County | 32,215 | none | none | | none | none |
| Montezuma County | 26,841 | none | none | none | none |
| Chaffee County | 20,780 | none | none | none | none |
| Otero County | 17,991 | none | none | none | none |
| Gunnison County | 17,310 | none | none | none | none |
| Grand County | 16,154 | none | none | none | none |
| Las Animas County | 14,518 | none | none | none | none |
| Archuleta County | 14,112 | none | none | none | none |
| Prowers County | 11,957 | none | none | none | none |
| Rio Grande County | 11,132 | none | none | none | none |
| Yuma County | 10,048 | none | none | none | none |
| San Miguel County | 7,819 | none | none | none | none |
| Kit Carson County | 7,080 | none | none | none | none |
| Huerfano County | 6,988 | none | none | none | none |
| Saguache County | 6,670 | none | none | none | none |
| Rio Blanco County | 6,607 | none | none | none | none |
| Bent County | 5,779 | none | none | none | none |
| Crowley County | 5,600 | none | none | none | none |
| Lincoln County | 5,598 | none | none | none | none |
| Custer County | 5,553 | none | none | none | none |
| Ouray County | 5,197 | none | none | none | none |
| Washington County | 4,771 | none | none | none | none |
| Phillips County | 4,488 | none | none | none | none |
| Baca County | 3,367 | none | none | none | none |
| Dolores County | 2,467 | none | none | none | none |
| Sedgwick County | 2,257 | none | none | none | none |
| Cheyenne County | 1,712 | none | none | none | none |
| Kiowa County | 1,392 | none | none | none | none |
| Jackson County | 1,273 | none | none | none | none |
| Mineral County | 933 | none | none | none | none |
| San Juan County | 821 | none | none | none | none |
| Hinsdale County | 747 | none | none | none | none |
| All 64 Colorado counties | 5,957,493 | The 17 Colorado core-based statistical areas | 5,677,316 | The 3 Colorado combined statistical areas | 4,106,604 |

## 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 Colorado :
| 2024 rank | Core-based statistical area | Population | Population | Population | Population | Population | Population | Population |
| 2024 rank | Core-based statistical area | 2024 estimate | Change | 2020 Census | Change | 2010 Census | Change | 2000 Census |
| 1 | Denver-Aurora-Centennial, CO MSA | 3,052,498 | +2.99% | 2,963,821 | +16.53% | 2,543,482 | +16.70% | 2,179,476 |
| 2 | Colorado Springs, CO MSA | 777,634 | +2.98% | 755,105 | +16.96% | 645,613 | +20.12% | 537,475 |
| 3 | Fort Collins-Loveland, CO MSA | 374,574 | +4.32% | 359,066 | +19.84% | 299,630 | +19.14% | 251,494 |
| 4 | Greeley, CO MSA | 369,745 | +12.39% | 328,981 | +30.12% | 252,825 | +39.86% | 180,766 |
| 5 | Boulder, CO MSA | 330,262 | −0.15% | 330,758 | +12.29% | 294,567 | +9.19% | 269,784 |
| 6 | Pueblo, CO MSA | 169,866 | +1.01% | 168,162 | +5.72% | 159,063 | +12.42% | 141,490 |
| 7 | Grand Junction, CO MSA | 161,260 | +3.57% | 155,703 | +6.12% | 146,723 | +25.47% | 116,939 |
| 8 | Rifle, CO μSA | 79,810 | +0.97% | 79,043 | +7.49% | 73,537 | +25.33% | 58,675 |
| 9 | Durango, CO μSA | 56,823 | +2.13% | 55,638 | +8.38% | 51,334 | +16.78% | 43,957 |
| 10 | Edwards, CO μSA | 54,330 | −2.51% | 55,731 | +6.77% | 52,197 | +25.40% | 41,623 |
| 11 | Cañon City, CO μSA | 50,093 | +2.36% | 48,939 | +4.52% | 46,824 | +1.48% | 46,140 |
| 12 | Montrose, CO μSA | 44,806 | +4.98% | 42,679 | +3.40% | 41,276 | +23.44% | 33,438 |
| 13 | Steamboat Springs, CO μSA | 38,385 | +0.69% | 38,121 | +2.19% | 37,304 | +13.53% | 32,857 |
| 14 | Breckenridge, CO μSA | 38,251 | −0.62% | 38,491 | +9.03% | 35,304 | +12.53% | 31,374 |
| 15 | Fort Morgan, CO μSA | 30,300 | +4.08% | 29,111 | +3.38% | 28,159 | +3.63% | 27,172 |
| 16 | Alamosa, CO μSA | 27,924 | +2.15% | 27,336 | +0.41% | 27,225 | +0.74% | 27,026 |
| 17 | Sterling, CO μSA | 20,755 | −3.59% | 21,528 | −5.20% | 22,709 | +10.42% | 20,566 |
| The 17 Colorado core-based statistical areas | The 17 Colorado core-based statistical areas | 5,677,316 | +3.26% | 5,498,213 | +15.56% | 4,757,772 | +17.76% | 4,040,252 |

## 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 Colorado :
| 2024 rank | Combined statistical area | Population | Population | Population | Population | Population | Population | Population |
| 2024 rank | Combined statistical area | 2024 estimate | Change | 2020 Census | Change | 2010 Census | Change | 2000 Census |
| 1 | Denver-Aurora-Greeley, CO CSA | 3,752,505 | +3.56% | 3,623,560 | +17.23% | 3,090,874 | +17.52% | 2,630,026 |
| 2 | Pueblo-Cañon City, CO CSA | 219,959 | +1.32% | 217,101 | +5.45% | 205,887 | +9.73% | 187,630 |
| 3 | Edwards-Rifle, CO CSA | 134,140 | −0.47% | 134,774 | +7.19% | 125,734 | +25.36% | 100,298 |
| The 3 Colorado combined statistical areas | The 3 Colorado combined statistical areas | 4,106,604 | +3.30% | 3,975,435 | +16.16% | 3,422,495 | +17.29% | 2,917,954 |