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U.S. Demographic Data
Provides access to recent U.S. decennial census data, the American Community Survey (ACS), population estimates and more. Includes basic mapping feature.
National Historical Geographical Information System (NHGIS)
NHGIS provides free online access to summary statistics and GIS boundary files for U.S. censuses (Decennial and ACS) from 1790 through the present. It includes county and state tables since 1790; census tract tables since 1910; census blocks, since 1970. It also includes other surveys, including County Business Patterns data (1970-2002, annual); Agricultural census data (1840-1950); Religious bodies data (1850-1952); and Manufacturing census data (1840-1940).
Integrated Public Use Microdata Series (IPUMS)
IPUMS consists of microdata from more than fifty high-precision samples of the American population drawn from federal censuses (1850-2000) and from the American Community Surveys (2000+). Allows users to create their own samples of the US population rather than relying on the Census Bureau's pre-set tables.
Current Population Survey
The CPS is a monthly interview survey conducted by the Census Bureau, which provides supplementary data on the economic status and activities of the population of the United States. The Current Population Reports appear as several series of reports providing current, historical, or projected data on various population and housing subjects. They are especially valuable for information on the years in between the census years. They are classed in the U.S. Government Documents collection under C3.186. The March survey is the main one; however, specialized questions on topics such as school enrollment, computer ownership, voter registration, and food security are periodically asked (see a list of supplements by topic
). You can create tables of data
or download the microdata from IPUMS