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. [1] 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 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.
Core-based statistical area [1] | 2023 population (est.) [3] | County | 2023 population (est.) [3] | ||
---|---|---|---|---|---|
Portland-Lewiston-South Portland, ME CSA | 680,094 | Portland-South Portland, ME MSA | 566,329 | Cumberland County, Maine | 310,230 |
York County, Maine | 218,586 | ||||
Sagadahoc County, Maine | 37,513 | ||||
Lewiston-Auburn, ME MSA | 113,765 | Androscoggin County, Maine | 113,765 | ||
none | Bangor, ME MSA | 155,312 | Penobscot County, Maine | 155,312 | |
Augusta-Waterville, ME μSA | 127,259 | Kennebec County, Maine | 127,259 | ||
none | Aroostook County, Maine | 67,351 | |||
Oxford County, Maine | 59,905 | ||||
Hancock County, Maine | 56,526 | ||||
Somerset County, Maine | 51,302 | ||||
Knox County, Maine | 40,977 | ||||
Waldo County, Maine | 40,620 | ||||
Lincoln County, Maine | 36,507 | ||||
Washington County, Maine | 31,555 | ||||
Franklin County, Maine | 30,828 | ||||
Piscataquis County, Maine | 17,486 | ||||
State of Maine | 1,395,722 |
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. Of the five statistical areas of Maine, three are PSAs comprising one combined statistical area, one metropolitan statistical area and one micropolitan statistical area.
2020 rank | Primary statistical area [1] | Population | ||||
---|---|---|---|---|---|---|
2023 estimate [3] | Change | 2020 Census [4] | Change | 2010 Census [5] | ||
1 | Portland-Lewiston-South Portland, ME CSA | 680,094 | +2.60% | 662,879 | +6.61% | 621,800 |
2 | Bangor, ME MSA | 155,312 | +2.05% | 152,199 | −1.12% | 153,923 |
3 | Augusta-Waterville, ME μSA | 127,259 | +2.93% | 123,642 | +1.22% | 122,151 |
The U.S. state of Indiana currently has 50 statistical areas that have been delineated by the Office of Management and Budget (OMB). On July 21, 2023, the OMB delineated ten combined statistical areas, 15 metropolitan statistical areas, and 25 micropolitan statistical areas in Indiana.. As of 2023, the largest of these was the Indianapolis-Carmel-Muncie, IN Combined Statistical Area, consisting of Indianapolis and its surrounding counties.
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 United States Commonwealth of Kentucky currently has 32 statistical areas that have been delineated by the Office of Management and Budget (OMB). On July 21, 2023, the OMB delineated 8 combined statistical areas, 9 metropolitan statistical areas, and 15 micropolitan statistical areas in Kentucky. As of 2023, the largest of these is the Louisville-Jefferson County--Elizabethtown, KY-IN CSA, comprising greater Louisville, Kentucky's largest city.
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 Hawaiʻi 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 Hawaiʻi. As of 2023, the most populous of these is the Urban Honolulu, HI MSA, anchored by Hawaiʻi's capital and largest city, Honolulu, on the island of Oahu.
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 34 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 Delaware currently has four 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, two metropolitan statistical areas, and one micropolitan statistical area in Delaware. As of 2023, the largest statistical area in the state is the Philadelphia-Reading-Camden, PA-NJ-DE-MD Combined Statistical Area, which includes Delaware's largest city, Wilmington.
The U.S. State of Florida currently has 35 statistical areas that have been delineated by the Office of Management and Budget (OMB). On July 21, 2023, the OMB delineated 7 combined statistical areas, 22 metropolitan statistical areas, and 6 micropolitan statistical areas in Florida. As of 2023, the largest of these is the Miami-Port St. Lucie-Fort Lauderdale, FL CSA, inclusive of the southeastern region of the state centered on Miami.
The U.S. State of Georgia currently has 46 statistical areas that have been delineated by the Office of Management and Budget (OMB). On July 21, 2023, the OMB delineated 7 combined statistical areas, 15 metropolitan statistical areas, and 24 micropolitan statistical areas within Georgia. As of 2023, the largest of these is the Atlanta--Athens-Clarke County--Sandy Springs, GA-AL CSA, encompassing 42 counties in Georgia and one in Alabama, anchored by Georgia's capital and largest city, Atlanta.
The U.S. State of Idaho currently has 22 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, seven metropolitan statistical areas, and 10 micropolitan statistical areas in Idaho. As of 2023, the largest of these is the Boise City-Mountain Home-Ontario, ID-OR CSA, anchored by Idaho's capital and largest city, Boise.
The U.S. State of Iowa currently has 31 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, nine metropolitan statistical areas, and 15 micropolitan statistical areas in Iowa.. As of 2023, the largest of these is the Des Moines-West Des Moines-Ames, IA CSA, comprising the area around Iowa's capital and largest city, Des Moines.
The U.S. State of Kansas currently has 25 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, seven metropolitan statistical areas, and 15 micropolitan statistical areas in Kansas. As of 2023, the largest of these is the Kansas City-Overland Park-Kansas City, MO-KS CSA, comprising the area around Kansas City, Missouri.
The U.S. State of Maryland currently has 13 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, six metropolitan statistical areas, and four micropolitan statistical areas in Maryland. 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 as well as Maryland's largest city of Baltimore.
The U.S. State of Louisiana currently has 25 statistical areas that have been delineated by the Office of Management and Budget (OMB). On July 21, 2023, the OMB delineated six combined statistical areas, ten metropolitan statistical areas, and nine micropolitan statistical areas in Louisiana. As of 2023, the largest of these is the New Orleans-Metairie-Slidell, LA-MS CSA, comprising the area around New Orleans in the southeast region of the state.
The United States federal government defines and delineates the nation's metropolitan areas for statistical purposes, using a set of standard statistical area definitions. As of 2023, the U.S. Office of Management and Budget (OMB) defined and delineated 393 metropolitan statistical areas (MSAs) and 542 micropolitan statistical areas (μSAs) in the United States and Puerto Rico. Many of these 935 MSAs and μSAs are, in turn, components of larger combined statistical areas (CSAs) consisting of adjacent MSAs and μSAs that are linked by commuting ties; as of 2023, 582 metropolitan and micropolitan areas are components of the 184 defined CSAs. A collective term for MSAs, μSAs, and CSAs is primary statistical areas (PSAs), though that term is not used by OMB.
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