Census of Population and Housing, 1970 [United States]: Summary Statistic File 4A -- Population [Fourth Count] (ICPSR 9014)

Published: Jan 12, 2006

Principal Investigator(s):
United States Department of Commerce. Bureau of the Census



Version V2

These data are from the 20-, 15-, and 5-percent samples of the 1970 United States Census of Population and Housing, and contain population characteristics such as education, occupation, income, citizenship, and vocational training. Separate tallies are shown for whites, Blacks, Hispanic Americans (referred to as Spanish Americans in the 1970 Census), and the total population. The unit of observation for these data files is the census tract. There is one file for each of 48 states and the District of Columbia. The Census Bureau did not issue data for Vermont and Wyoming because these two states were untracted in 1970.

United States Department of Commerce. Bureau of the Census. Census of Population and Housing, 1970 [United States]:  Summary Statistic File 4A -- Population [Fourth Count]. Ann Arbor, MI: Inter-university Consortium for Political and Social Research [distributor], 2006-01-12. https://doi.org/10.3886/ICPSR09014.v2

Export Citation:

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In the 1970 Census Users' Guide, this data collection is named "Fourth Count Population Summary Tape, File A."

The codebook, Part 70, Codebook for All Parts, consists of Parts 1 and 2 of the 1970 Census Users' Guide published by the Bureau of the Census.

The data were provided to ICPSR by the Center of Demography and Ecology at the University of Wisconsin.

Part numbers correspond to FIPS codes of states and are not consecutive.

The number of tracts (cases) varies by state. For the entire United States, there are approximately 35,000 tracts. Each case comprises up to 22 records and has a maximum of 5,098 variables.

All persons and housing units in the United States.

self-enumerated questionnaires

census/enumeration data



2006-01-12 All files were removed from dataset 70 and flagged as study-level files, so that they will accompany all downloads.

2001-03-27 The data for this collection, previously available only in DUALabs format, are now available as ASCII files. Also, the parts have been renumbered according to state FIPS codes.

1997-02-13 An electronic codebook in PDF format has been added as Part 52.


  • Data in this collection are available only to users at ICPSR member institutions.

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