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Tennessee GIS: Census Data
From the site: "These data sets are derived from the U.S. Census Bureau's 2000 Redistricting version of the TIGER line files. The population data associated or joined with these... -
U.S. Census Bureau - Geography
Easy access to census data in map, KML, shapefile, and other formats. Could be used for GIS mapping. -
Tennessee GIS: Data Collections main page
A collection of commonly used GIS datasets for Tennessee; collections include data for Tennessee wetlands, geology, censuses, soils, digital raster graphics, and digital... -
Fairfax County, VA GIS data collection
A listing of links for downloading GIS data regarding Fairfax County VA; of particular interest are the downloadable census/geography, soils, and water files. -
Population data by county for each state
Census data compiled into maps and tables to provide easy access to population information.
E' possibile inoltre accedere al registro usando le API (vedi Documentazione API).