Guides: GIS &amp; Mapping: Historical GIS data

Historical Geospatial Data

United States Congressional Districts (1789- present)
Shapefiles for each session of Congress
National Historical Geographic Information Systems
The National Historical Geographic Information System (NHGIS) provides, free of charge, aggregate census data and GIS-compatible boundary files for the United States for years from 1790 through the present and for all levels of U.S. census geography, including states, counties, tracts, and blocks.
IPUMS
Provides census and survey data from around the world integrated across time and space. IPUMS integration and documentation makes it easy to study change, conduct comparative research, merge information across data types, and analyze individuals within family and community contexts. Data and services available free of charge.
PhillyHistory
Philadelphia City Archive is one of the country's largest municipal archives, with about 2 million photographs, dating from the late 1800's.
Greater Philadelphia Geohistory
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This site contains thousands of old maps, property atlases, city directories, industrial site surveys, and other items documenting the history and development of the city from the 1600s through today.