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2020 Census 2026 Census Test 2030 Census American Community Survey (ACS) American Housing Survey (AHS) Annual Business Survey (ABS) Annual Integrated Economic Survey (AIES) County Business Patterns (CBP) Current Population Survey (CPS) Economic Census Household Pulse Survey International Programs Metro and Micro Areas Population Estimates Population Projections Small Area Income and Poverty Statistics of U.S. Businesses Survey of Income and Program Participation (SIPP)
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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

Legal Government Names and BAS Codes

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

Page Last Revised - January 2, 2025
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