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BAS Code Lists

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Within Technical Documentation

BAS Code Lists

All federally recognized American Indian areas (AIA), counties (and equivalent areas), incorporated places, consolidated cities, and Minor Civil Divisions (MCDs) are assigned and identified by unique Boundary and Annexation Survey (BAS) IDs. 

Please use the links below to determine the BAS ID for your government. 

American Indian Area Names and BAS Codes

xls American Indian Area Names and BAS codes [<1.0 MB]

Legal Government Names and BAS Codes

xls Names and BAS codes [<1.0 MB]

BAS Governments Summarized by State & Type (County, Place, MCD)

pdf BAS Governments Summarized by State & Type (County, Place, MCD) [<1.0 MB]
Page Last Revised - November 29, 2023
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