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1940 IPUMS Research
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The Integrated Public Use Microdata Series (IPUMS) is the world's largest population database, including individual-level microdata from the U.S. decennial censuses of 1790-2010. The 1940 IPUMS Research file includes the complete count U.S. census microdata from 1940. This microdata represents the fruition of longstanding collaborations between IPUMS and the nation's two largest genealogical organizations, Ancestry.com and FamilySearch, to leverage genealogical data for scientific purposes. This microdata collection is possible due to the donations of an unprecedented scale of digitized census data by both Ancestry.com and FamilySearch.
The complete count 1940 census microdata is available to researchers directly from the University of Minnesota. Researchers should select this data from ResearchDataGov only if they intend to use the files as part of a project in the Federal Statistical Research Data Centers.
The project review timeframes above do not apply to applications that request access to confidential data assets commingled with data that are either not owned, or are only co-owned, by the statistical agency(s) or unit(s) and require approval from third parties not subject to this policy (e.g., state and local government agencies).
Detailed Methodology
- Mixed or multi modes
- Every ten years
Contains the complete 1940 population. Data from Alaska, Hawaii, and other U.S. territories are not currently made available. Data was entered and made available by Ancestry.com. Name and other identifying information is not available from the IPUMS website. Genealogists wanting the 1940 census data are advised to use Ancestry.com. Academic researchers interested in access to restricted 1940 data should email ipums@umn.edu Users of this data agree to the following conditions: 1) This data will be used for research and educational purposes only; 2) This data will not be republished; 3) User will not link individual records to the original enumeration images.
- State FIPS code
- Other (see Linkage Capabilities description)
MIGPLAC5 (State/Country of Residence, 5 years ago) . City (City of Residence) . Country (Country of Residence) . County (County of Residence) . Metarea (Metropolitan Area) . metdist (Metropolitan District . stateicp (State ICPSR Code); MIGPLAC5 (State/Country of Residence, 5 years ago); City (City of Residence); Country (Country of Residence); County (County of Residence); Metarea (Metropolitan Area); metdist (Metropolitan District; stateicp (State ICPSR Code)