Demographic Profile (DP1) table. shapefiles http://www.census.gov/geo/maps-data/data/tiger-data.html 2010 US census some handy ones U.S. Census blocks shapefiles TIGER/Line Shapefiles pre-joined with Demographic Data Demographic Profile data TIGER Geodatabases U.S. Census Bureau https://www.census.gov/geo/maps-data/data/tiger-data.html http://www.census.gov/geo/maps-data/data/tiger-data.html some handy ones census tract level http://www.census.gov/geo/maps-data/data/tiger-data.html Select shapefiles pre-joined with demographic data block-level population data http://www.census.gov/geo/maps-data/data/tiger-data.html Tiger/Line with Selected Demographic and Economic Data TIGER/Line® with Selected Demographic and Economic Data 2010 US Census TIGER datasets some handy ones census tract level U.S. Census Bureau U.S. Census Bureau U.S. Census Bureau some handy ones http://www.census.gov/geo/maps-data/data/tiger-data.html TIGER/Line with Selected Demographic and Economic Data http://www.census.gov/geo/maps-data/data/tiger-data.html block-level population data block-level population data block-level population data