Statistical Area
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Statistical Area

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 2013, the U.S. Office of Management and Budget (OMB) defined and delineated 388 metropolitan statistical areas (MSAs) and 541 micropolitan statistical areas (?SAs) in the United States and Puerto Rico.[1] Many of these 929 MSAs and ?SAs are, in turn, components of larger combined statistical areas (CSAs) consisting of adjacent MSAs and ?SAs that are linked by commuting ties; as of 2013, 524 metropolitan and micropolitan areas are components of the 169 defined CSAs.

Metropolitan and micropolitan statistical areas are defined as consisting of one or more adjacent counties or county equivalents with at least one urban core area meeting relevant population thresholds, plus adjacent territory that has a high degree of social and economic integration with the core, as measured by commuting ties. A metropolitan statistical area has at least one urban core with a population of at least 50,000. In a micropolitan statistical area, the largest urban core has a population of at least 10,000 but less than 50,000.

## Maps

An enlargeable map of the 929 core-based statistical areas (MSAs and ?SAs) of the United States and Puerto Rico. The 388 MSAs are shown in medium green. The 541 ?SAs are shown in light green.
An enlargeable map of the 169 combined statistical areas (CSAs) of the United States and Puerto Rico.

## Types and distribution

The sortable table below shows the number of metropolitan and micropolitan statistical areas in each of the U.S. states, the District of Columbia, and Puerto Rico. For each jurisdiction, it lists:

1. Total number of delineated areas wholly or partially in the named jurisdiction[1]
2. The number of primary statistical areas (i.e., CSAs plus any MSAs and µSAs that are not included in a CSA) wholly or partially in the jurisdiction[1]
3. The number of CSAs wholly or partially in the jurisdiction[1]
4. The number of core-based statistical areas (i.e., MSAs and µSAs) wholly or partially in the jurisdiction[1]
5. The number of MSAs wholly or partially in the jurisdiction[1]
6. The number of µSAs wholly or partially in the jurisdiction[1]
7. The number of counties and county-equivalents in the jurisdiction[2]

Please note: Because many metropolitan and micropolitan areas overlap jurisdictional boundaries, columns are not additive.

Number of metropolitan and micropolitan areas in the United States and Puerto Rico

Jurisdiction Delineated areas Primary statistical areas CSAs Core-based areas MSAs ?SAs Counties
Alabama[3] 28 13 6 22 13 9 67
Alaska 4 4 0 4 2 2 29   29[4]
Arizona 13 10 2 11 7 4 15
Arkansas[3] 26 17 4 22 8 14 75
California[3] 41 20 7 34 26 8 58
Colorado 21 12 4 17 7 10 64
Connecticut[3] 9 3 3 6 5 1 8
Delaware[3] 4 2 1 3 3 0 3
Florida 36 19 7 29 22 7 67
Georgia[3] 46 26 8 38 15 23 159
Hawaiʻi 4 4 0 4 2 2 5
Idaho[3] 20 12 4 16 6 10 44
Illinois[3] 45 22 12 33 13 20 102
Indiana[3] 49 19 10 39 15 24 92
Iowa[3] 29 18 5 24 9 15 99
Kansas[3] 25 16 3 22 6 16 105
Kentucky[3] 32 17 7 25 9 16 120
Louisiana[3] 22 11 4 18 9 9 64   64[5]
Maine 5 3 1 4 3 1 16
Maryland[3] 11 4 2 9 7 2 24   24[6]
Massachusetts[3] 10 4 2 8 6 2 14
Michigan[3] 42 20 7 35 15 20 83
Minnesota[3] 28 17 4 24 8 16 87
Mississippi[3] 26 19 4 22 4 18 82
Missouri[3] 35 20 7 28 9 19 115    115[7]
Montana 7 7 0 7 3 4 56
Nebraska[3] 16 11 3 13 4 9 93
Nevada[3] 11 5 2 9 3 6 17    17[8]
New Hampshire[3] 8 4 1 7 2 5 10
New Jersey[3] 9 2 2 7 7 0 21
New Mexico 21 12 3 18 4 14 33
New York[3] 33 15 7 26 12 14 62
North Carolina[3] 52 21 11 41 17 24 100
North Dakota[3] 9 7 1 8 3 5 53
Ohio[3] 59 20 12 47 14 33 88
Oklahoma[3] 26 18 4 22 4 18 77
Oregon[3] 24 15 4 20 8 12 36
Pennsylvania[3] 47 21 11 36 20 16 67
Rhode Island[3] 2 1 1 1 1 0 5
South Carolina[3] 21 10 4 17 10 7 46
South Dakota[3] 14 10 2 12 3 9 66
Tennessee[3] 32 15 6 26 10 16 95
Texas[3] 80 48 12 68 25 43 254
Utah[3] 11 6 1 10 5 5 29
Vermont[3] 6 6 0 6 1 5 14
Virginia[3] 19 13 4 15 11 4 133    133[9]
Washington[3] 27 14 5 22 13 9 39
West Virginia[3] 22 12 5 17 11 6 55
Wisconsin[3] 36 16 8 28 15 13 72
Wyoming[3] 9 9 0 9 2 7 23
District of Columbia[10] 2 1 1 1 1 0 1    1[11]
United States 1083 569 166 917 381 536     3142[12]
Puerto Rico 15 5 3 12 7 5 78    78[13]
United States & Puerto Rico 1098 574 169 929 388 541     3220[14]

## References

1. "OMB Bulletin No. 13-01: Revised Delineations of Metropolitan Statistical Areas, Micropolitan Statistical Areas, and Combined Statistical Areas, and Guidance on Uses of the Delineations of These Areas" (PDF). United States Office of Management and Budget. February 28, 2013. Retrieved 2013.
2. ^ "Annual Estimates of the Resident Population for Counties and County-Equivalents: April 1, 2010 to July 1, 2012". 2012 Population Estimates. United States Census Bureau, Population Division. April 2012. Archived from the original (CSV) on July 7, 2013. Retrieved 2013.
3. This state shares one or more statistical areas with one or more other states.
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7. ^ The State of Maryland has 114 counties, and the 1 independent city.
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10. ^ The District of Columbia shares both its statistical areas with nearby states.
11. ^ The District of Columbia has no counties or other subdivisions, but the District itself is considered a county-equivalent.
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