Combined statistical area

Population 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.

[1][2] OMB defines a CSA by various combinations of adjacent metropolitan and micropolitan areas with economic ties measured by commuting patterns.

As of 2023, there are 181 combined statistical areas across the United States, plus another three in the territory of Puerto Rico.

[3] The following table lists the 181 combined statistical areas (CSAs) of the United States with the following information: Metropolitan statistical areas that are not also combined with other MSAs or CBSAs are not listed below.

The following sortable table lists the three combined statistical areas (CSAs) of Puerto Rico with the following information:

An enlargeable map of the 175 combined statistical areas (CSAs) of the United States (172) and Puerto Rico (3) as defined in 2020