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The 2019 BAS maps are the most recent maps created for the BAS program. They display the updated legal boundaries and names valid through January 1, 2018, for all governmental units that participated in the 2018 BAS. The 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 2019 BAS Maps and their naming conventions, please visit the File Naming Conventions page.

Maps for Tribal Areas

Access Maps for American Indian areas and Hawaiian home lands:

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Maps for United States and Puerto Rico

NOTE:  Some of the maps are very large files and downloading time for these will depend on your internet access speed.

Consolidated Cities

Access consolidated cities maps for the following states:

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