The National Historical Geographic Information System (NHGIS; free registration required for access) offers historical census data from the first census (1790) to the most recent. The types and extent of the data depend on the census year, with more data typically available from more recent census years. Data can be accessed for the entire country, by state, county, census tract, or other divisions where available, and can be downloaded in a number of different spreadsheet and GIS-compatible formats. The site also has shapefiles for the states/territories, counties, and census tracts appropriate for each census year. Online mapping of, and access to, some of the data from 1940 on is available for free at the Social Explorer website; Social Explorer offers full access to much more data and online maps as a paid service.
Other posts in the Demographic Data series
- Plotting US Census Data In Google Earth
- Worldwide Digital Geographic Data From The FAO
- US Census Data (And More) Visualization In Google Earth
- Global One-Degree Gridded Economic And Climate Data
- Demographic Maps And Data From Social Explorer
- Interactive US Census Data Viewing In Google Earth With The GE-Census Explorer
- Demographic Data For Your Zipcode
- Historical Census Data From the National Historical Geographic Information System
- Free Neighborhood Boundary Shapefiles
- Some TIGER Data Finally Out In Shapefile Format
- Old TIGER Data Still Available
- Urban & Environmental Modeler’s Datakit
- Mapping Human DNA Diversity
- Quick Country Information With The World Gazetteer
- Plot Demographic Data In Map, Graph, And Tabular Format With PolicyMap
- Animated 3D Thematic Maps With Uuorld
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