Category: Boundaries

County Adjacency File (2026)

U.S. Census Bureau, Geography Division

Commercial
Yes
Format
Several
Coverage
United States, DC, Puerto Rico and Island Areas (counties)
Last updated
Added to findgis 31 Oct 2026 · Update frequency Annual

The 2026 file covers the 50 states, DC, Puerto Rico, American Samoa, the Northern Mariana Islands, Guam, and the US Virgin Islands.

Report a problem

Source and attribution

Publisher
U.S. Census Bureau, Geography Division
License
Public domain
Commercial use
Yes
Attribution required
No
Modification allowed
See publisher
Redistribution allowed
See publisher
Share-alike
No
U.S. Government work (17 U.S.C. 105); public domain. Census Bureau dataset pages describe the files as "Data files, for public use"; no licence restriction is stated. (rule au: US federal data with no licence beyond a disclaimer/"for public use" wording; public domain under 17 U.S.C. 105.)
Type
Vector
Time
2026–2026
Extent
-179.217.6-64.571.4West, south, east, north. Approximate region extent.

Related datasets