Official U.S. Census Sites

• American FactFinder – Contains fact sheets, static and interactive maps, data downloads for 1990 and 2000, and extensive documentation.
  http://factfinder.census.gov
• Census 2000 Summary File 1 (SF1)
  http://www.census.gov/Press-Release/www/2001/sumfile1.html
• Census 2000 Summary File 3 (SF3)
  http://www.census.gov/Press-Release/www/releases/archives/census_2000/000548.html
• Census 2000 TIGER/Line Files
  http://www.census.gov/geo/www/tiger/tigerua/ua_tgr2k.html

Historical Data

• National Historical Geographic Information System ( Minnesota Population Center, University of Minnesota) – Project to create and disseminate census information back to 1790.
  http://www.nhgis.org

Census Maps and Analysis

• CensusScope (Social Science Data Analysis Network at the Population Studies Center, University of Michigan) - Contains web tools for investigating U.S. demographic trends.
  http://www.censusscope.org
• Lewis Mumford Center for Comparative Urban and Regional Research (The University of Albany, SUNY) - Information and analyses of how the racial and ethnic composition of metropolitan areas has shifted in the last ten years.
  http://mumford.albany.edu/census
• Social Explorer (Queens College of the City University of New York) – Interactive maps for 1990 and 2000.
  http://www.socialexplorer.com
• MABLE/Geocorr2K (Missouri Census Data Center) - Geographic correspondence engine with Census 2000 geography.
  http://mcdc2.missouri.edu/websas/geocorr2k.html

Regional and Local

There are many regional and local projects highlighting census data in certain areas. These are some that we have found useful in our research.

• New York City Department of City Planning, Population Division – Maps and analyses of New York City’s population, as well as interactive neighborhood maps.
  http://www.nyc.gov/html/dcp/html/census/census.shtml
  http://gis.nyc.gov/dcp/pa/address.jsp
• Greater New Orleans Community Data Center – Information on New Orleans neighborhoods and the impact of Hurricane Katrina.
  http://www.gnocdc.org

Commercial Sites

There are a number of commercial firms that provide added-value census products, including pre-processed data, normalized data, population estimates, and geocoding services. This listing does not constitute an endorsement of these companies.

• Demographic Data Center
  http://usa-demographics.com
• GeoLytics
  http://www.geolytics.com

Global Data

• Gridded Population of the World, version 3 – Global 2.5 arc-minute gridded population data, based on 400,000 subnational census units.
  http://sedac.ciesin.columbia.edu/gpw
• Global Rural-Urban Mapping Project (GRUMP) - Global 30 arc-second gridded population data with urban reallocation. GRUMP is comprised of 400,000 census units and urban footprints based largely on nighttime lights.
  http://sedac.ciesin.columbia.edu/gpw
• LandScan – Global 30 arc-second gridded ambient population data, based on sub-national census data apportioned to each grid cell based on proximity to roads, slope, land cover, and other information.
  http://www.ornl.gov/sci/landscan