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. [1] As of 2023, the most populous of these statistical areas is the Denver-Aurora-Greeley, CO CSA, comprising the area around Colorado's capital and largest city of Denver.
The Office of Management and Budget (OMB) has designated more than 1,000 statistical areas for the United States and Puerto Rico. [2] 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, [2] "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". [2] 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. [2]
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%. [2] 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.
The following table provides the in-state population ranking of each CBSA along with its rate of population change over time.
| 2023 rank [3] | Core-based statistical area [1] | Population | ||||
|---|---|---|---|---|---|---|
| 2023 estimate [3] | Change | 2020 Census [4] | Change | 2010 Census [5] | ||
| 1 | Denver-Aurora-Centennial, CO MSA | 3,005,131 | +1.39% | 2,963,821 | +16.53% | 2,543,482 |
| 2 | Colorado Springs, CO MSA | 768,832 | +1.82% | 755,105 | +16.96% | 645,613 |
| 3 | Fort Collins-Loveland, CO MSA | 370,771 | +3.26% | 359,066 | +19.84% | 299,630 |
| 4 | Greeley, CO MSA | 359,442 | +9.26% | 328,981 | +30.12% | 252,825 |
| 5 | Boulder, CO MSA | 326,831 | −1.19% | 330,758 | +12.29% | 294,567 |
| 6 | Pueblo, CO MSA | 169,422 | +0.75% | 168,162 | +5.72% | 159,063 |
| 7 | Grand Junction, CO MSA | 159,681 | +2.55% | 155,703 | +6.12% | 146,723 |
| 8 | Rifle, CO μSA | 79,347 | +0.38% | 79,043 | +7.49% | 73,537 |
| 9 | Durango, CO μSA | 56,407 | +1.38% | 55,638 | +8.38% | 51,334 |
| 10 | Edwards, CO μSA | 54,381 | −2.42% | 55,731 | +6.77% | 52,197 |
| 11 | Cañon City, CO μSA | 50,318 | +2.82% | 48,939 | +4.52% | 46,824 |
| 12 | Montrose, CO μSA | 44,156 | +3.46% | 42,679 | +3.40% | 41,276 |
| 13 | Breckenridge, CO μSA | 37,830 | −1.72% | 38,491 | +9.03% | 35,304 |
| 14 | Steamboat Springs, CO μSA | 38,391 | +0.71% | 38,121 | +2.19% | 37,304 |
| 15 | Fort Morgan, CO μSA | 29,542 | +1.48% | 29,111 | +3.38% | 28,159 |
| 16 | Alamosa, CO μSA | 27,804 | +1.71% | 27,336 | +0.41% | 27,225 |
| 17 | Sterling, CO μSA | 20,619 | −4.22% | 21,528 | −5.20% | 22,709 |
The following table provides the in-state population ranking of each CSA along with its rate of population change over time.
| 2023 rank [3] | Combined statistical area [1] | Population | ||||
|---|---|---|---|---|---|---|
| 2023 estimate [3] | Change | 2020 Census [4] | Change | 2010 Census [5] | ||
| 1 | Denver-Aurora-Greeley, CO CSA | 3,691,404 | +1.87% | 3,623,560 | +17.23% | 3,090,874 |
| 2 | Pueblo-Cañon City, CO CSA | 219,740 | +1.22% | 217,101 | +5.45% | 205,887 |
| 3 | Edwards-Rifle, CO CSA | 133,728 | −0.78% | 134,774 | +7.19% | 125,734 |
In the United States, a metropolitan statistical area (MSA) is a geographical region with a relatively high population density at its core and close economic ties throughout the region. Such regions are not legally incorporated as a city or town would be and are not legal administrative divisions like counties or separate entities such as states. As a result, sometimes the precise definition of a given metropolitan area will vary between sources. The statistical criteria for a standard metropolitan area were defined in 1949 and redefined as a metropolitan statistical area in 1983.
Combined statistical area (CSA) is a United States Office of Management and Budget (OMB) term for a combination of adjacent metropolitan (MSA) and micropolitan statistical areas (μSA) across the 50 U.S. states and the territory of Puerto Rico that can demonstrate economic or social linkage. CSAs were first designated in 2003. OMB defines a CSA by various combinations of adjacent metropolitan and micropolitan areas with economic ties measured by commuting patterns. CSAs retain their own designations as metropolitan or micropolitan statistical areas in their respective larger combined statistical areas.
The U.S. State of Illinois currently has 47 statistical areas that have been delineated by the Office of Management and Budget (OMB). On July 21, 2023, the OMB delineated 14 combined statistical areas, 12 metropolitan statistical areas, and 21 micropolitan statistical areas in Illinois. As of 2023, the largest of these is the Chicago-Naperville, IL-IN-WI CSA, comprising the area around Illinois' largest city, Chicago.
The U.S. State of Ohio currently has 55 statistical areas that have been delineated by the Office of Management and Budget (OMB). On July 21, 2023, the OMB delineated 11 combined statistical areas, 15 metropolitan statistical areas, and 29 micropolitan statistical areas in Ohio. As of 2023, the largest of these is the Cleveland-Akron-Canton, OH CSA, comprising Cleveland and other cities in the northeast region of the state.
The United States Commonwealth of Pennsylvania currently has 48 statistical areas that have been delineated by the Office of Management and Budget (OMB). On July 21, 2023, the OMB delineated 12 combined statistical areas, 16 metropolitan statistical areas, and 20 micropolitan statistical areas in Pennsylvania. As of 2023, the largest of these is the Philadelphia-Reading-Camden, PA-NJ-DE-MD CSA, comprising the area around the state's largest city of Philadelphia in the southeast region of the state.
The U.S. state of New York currently has 34 statistical areas that have been delineated by the Office of Management and Budget (OMB). On July 21, 2023, the OMB delineated seven combined statistical areas, 13 metropolitan statistical areas and 14 micropolitan statistical areas in New York. As of 2023, the largest of these is the New York-Newark, NY-NJ-CT-PA CSA, which includes New York City and its surrounding suburbs; with over 21 million people, it is the largest primary statistical area in the United States.
The U.S. State of Connecticut currently has nine statistical areas that have been delineated by the Office of Management and Budget (OMB). On July 21, 2023, the OMB delineated two combined statistical areas, five metropolitan statistical areas, and two micropolitan statistical areas in Connecticut. As of 2023, the largest of these in the state is the New Haven-Hartford-Waterbury, CT CSA, encompassing the entire state outside of the Bridgeport-Stamford-Danbury, CT MSA in the southwest.
The U.S. State of Arizona currently has 13 statistical areas that have been delineated by the Office of Management and Budget (OMB). On July 21, 2023, the OMB delineated two combined statistical areas, seven metropolitan statistical areas, and four micropolitan statistical areas in Arizona. As of 2023, the most populous of these is the Phoenix-Mesa, AZ Combined Statistical Area, encompassing the area around Arizona's capital and largest city, Phoenix.
The U.S. State of Alaska currently has four statistical areas that have been delineated by the Office of Management and Budget (OMB). On July 21, 2023, the OMB delineated two metropolitan statistical areas and two micropolitan statistical areas in Alaska. The most populous of these statistical areas is the Anchorage, AK Metropolitan Statistical Area, centered on the state's largest city of Anchorage.
The U.S. State of Montana currently has seven statistical areas that have been delineated by the Office of Management and Budget (OMB). On July 21, 2023, the OMB delineated five metropolitan statistical areas and two micropolitan statistical areas in Montana. As of 2023, the largest of these is the Billings, MT MSA, comprising the area surrounding Montana's largest city of Billings.
The U.S. State of California currently has 42 statistical areas that have been delineated by the federal Office of Management and Budget (OMB).
The U.S. State of Alabama currently has 35 statistical areas that have been delineated by the Office of Management and Budget (OMB).
The U.S. State of Arkansas currently has 25 statistical areas that have been delineated by the Office of Management and Budget (OMB). On July 21, 2023, the OMB delineated four combined statistical areas, seven metropolitan statistical areas, and 14 micropolitan statistical areas in Arkansas. As of 2023, the most populous statistical area in the state is Little Rock-North Little Rock, AR CSA, comprising the metro area of its capital and largest city, Little Rock.
The U.S. State of Virginia currently has 19 statistical areas that have been delineated by the Office of Management and Budget (OMB). On July 21, 2023, the OMB delineated four combined statistical areas, 11 metropolitan statistical areas, and four micropolitan statistical areas in Virginia. As of 2023, the largest of these is the Washington-Baltimore-Arlington, DC-MD-VA-WV-PA CSA, comprising Washington, D.C. and its suburbs.
The U.S. State of West Virginia currently has 20 statistical areas that have been delineated by the Office of Management and Budget (OMB). On July 21, 2023, the OMB delineated five combined statistical areas, 10 metropolitan statistical areas, and five micropolitan statistical areas in West Virginia. As of 2023, the largest of these is the Charleston-Huntington-Ashland, WV-OH-KY CSA, which includes West Virginia's capital and largest city, Charleston.
The U.S. State of Maine currently has five statistical areas that have been delineated by the Office of Management and Budget (OMB). On July 21, 2023, the OMB delineated one combined statistical area, three metropolitan statistical areas, and one micropolitan statistical area in Maine. As of 2023, the largest of these is the Portland-Lewiston-South Portland, ME CSA, comprising the region around Maine's largest city of Portland.
The U.S. State of Nebraska currently has 16 statistical areas that have been delineated by the Office of Management and Budget (OMB). On July 21, 2023, the OMB delineated three combined statistical areas, four metropolitan statistical areas, and nine micropolitan statistical areas in Nebraska. As of 2023, the largest of these is the Omaha-Fremont, NE-IA CSA, comprising the area around Nebraska's largest city, Omaha.
The U.S. State of Oregon currently has 24 statistical areas that have been delineated by the Office of Management and Budget (OMB). On July 21, 2023, the OMB delineated four combined statistical areas, eight metropolitan statistical areas, and 12 micropolitan statistical areas in Oregon. As of 2023, the largest of these is the Portland-Vancouver-Salem, OR-WA CSA, anchored by Oregon's largest city, Portland and including its capital, Salem.
The Commonwealth of Puerto Rico currently has 13 statistical areas that have been delineated by the United States Office of Management and Budget (OMB). On July 21, 2023, the OMB delineated three combined statistical areas, six metropolitan statistical areas, and four micropolitan statistical areas in Puerto Rico. As of 2023, the largest of these is the San Juan-Bayamón, PR CSA, comprising the area around San Juan, Puerto Rico's capital and largest city.
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