National Historical Geographic Information System

The National Historical Geographic Information System (NHGIS) provides free online access to summary statistics and GIS boundary files for U.S. censuses and other nationwide surveys from 1790 through the present. Boundary files include: counties and states since 1790, census tracts since 1910, metropolitan areas since 1950, places and county subdivisions since 1980, all standard census reporting areas since 1990, and SABINS school attendance areas for 2009-12. Summary tables from decennial censuses and the American Community...
This data repository is not currently reporting usage information. For information on how your repository can submit usage information, please see our documentation.