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Demographic Characteristics of the Population of the United States, 1930-1950: County-Level (ICPSR 20)

Principal Investigator(s): Gardner, John, University of Chicago. Center for Urban Studies; Cohen, William, University of Chicago. Center for Urban Studies


This data collection contains county-level information on total number of population and internal migration in the United States from 1930 to 1950. Demographic information is provided on race, age, and sex for the counties. There are variables that provide information by age group on the number of native-born white males and females, foreign-born white males and females, Black males and females, and males and females of other nationalities such as Indians, Japanese, and Chinese. For 1930 and 1940, the population is tabulated in five-year intervals until age 34 and in ten-year intervals thereafter. For 1950, the numbers of whites and non-whites are given by sex and age in five-year intervals. Additional variables provide information by age group on net migration of white males and females, and on Black males and females. Other variables give information on births and deaths.

Access Notes

  • Data in this collection are available only to users at ICPSR member institutions. Please log in so we can determine if you are with a member institution and have access to these data files.


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Study Description


Gardner, John, and William Cohen. Demographic Characteristics of the Population of the United States, 1930-1950: County-Level. ICPSR00020-v1. Ann Arbor, MI: Inter-university Consortium for Political and Social Research [distributor], 1992. https://doi.org/10.3886/ICPSR00020.v1

Persistent URL: https://doi.org/10.3886/ICPSR00020.v1

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This study was funded by:

  • United States Department of Health, Education and Welfare
  • United States Social Security Administration
  • United States Department of Commerce. Economic Development Administration

Scope of Study

Subject Terms:    African Americans, birth rates, counties, demographic characteristics, ethnic groups, internal migration, mortality rates, population dynamics, population migration

Geographic Coverage:    United States

Time Period:   

  • 1930--1950

Universe:    A total of 3,111 counties, plus a few aggregated spatial units, in the 50 states of the United States.

Data Type(s):    census data, and aggregate data


Data Source:

United States Bureau of the Census censuses of population for 1930, 1940, and 1950

Extent of Processing:   ICPSR data undergo a confidentiality review and are altered when necessary to limit the risk of disclosure. ICPSR also routinely creates ready-to-go data files along with setups in the major statistical software formats as well as standard codebooks to accompany the data. In addition to these procedures, ICPSR performed the following processing steps for this data collection:

  • Checked for undocumented or out-of-range codes.


Original ICPSR Release:   1984-06-28

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