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2012 Boundary and Annexation Survey Maps

The U.S. Census Bureau conducts the Boundary and Annexation Survey (BAS) annually to collect information about selected legally defined geographic areas.  The BAS is used to update information about the legal boundaries and names of governmental units in the United States.  The 2012 BAS maps display the updated legal boundaries and names valid thru January 1, 2011, for all governmental units that participated in the 2011 BAS.

The 2012 BAS Maps are an entity-based map series.   These reference maps are created for the following geographic entities:   counties or county equivalents, minor civil divisions (MCDs), places, consolidated cities, American Indian areas/Alaska Native areas (AIAs) and Hawaiian Home Lands (HHLs).  

For more detailed information about the 2012 BAS Maps and their naming conventions, please visit the Description Page.

Please select American Indian Areas, Hawaiian Home Lands or the state your entity is in:
American Indian Areas Hawaii Missouri Puerto Rico
Hawaiian Home Lands Idaho Montana Rhode Island
  Illinois Nebraska South Carolina
Alabama Indiana Nevada South Dakota
Alaska Iowa New Hampshire Tennessee
Arizona Kansas New Jersey Texas
Arkansas Kentucky New Mexico Utah
California Louisiana New York Vermont
Colorado Maine North Carolina Virginia
Connecticut Maryland North Dakota Washington
Delaware Massachusetts Ohio West Virginia
District Of Columbia Michigan Oklahoma Wisconsin
Florida Minnesota Oregon Wyoming
Georgia Mississippi Pennsylvania

Source: U.S. Census Bureau
Geography Division
Geographic Areas Branch

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