The cartographic boundary files are simplified representations of selected geographic areas from the Census Bureau’s MAF/TIGER geographic database. These boundary files are specifically designed for small scale thematic mapping.
The National Historical Geographic Information System (NHGIS) provides easy access to summary tables and time series of population, housing, agriculture, and economic data, along with GIS-compatible boundary files, for years from 1790 through the present and for all levels of U.S. census geography, including states, counties, tracts, and blocks.
IPUMS Terra uses location-based integration to make population microdata, area-level data describing places, and spatially gridded raster data interoperable. IPUMS Terra data span the globe and extend over several decades.
The International Historical Geographic Information System (IHGIS) provides data tables from population and housing censuses as well as agricultural censuses from around the world, along with corresponding GIS boundary files.
Index of social science datasets with access to all sets. Most data sets require knowledge of a statistical software package--such as SPSS or STATA--in order to use. Includes searchable bibliography of research done relative to available data sets.
The Data Hub showcases the most current national and state-level demographic, social, and economic facts about immigrants to the United States; as well as stock, flow, citizenship, net migration, and historical data for countries in Europe, North America, and beyond.
Migration data for the United States are based on year-to-year address changes reported on individual income tax returns filed with the IRS. They present migration patterns by State or by county for the entire United States and are available for inflows—the number of new residents who moved to a State or county and where they migrated from, and outflows—the number of residents leaving a State or county and where they went.