The 72-Year Rule

The U.S. government will not release personally identifiable information about an individual to any other individual or agency until 72 years after it was collected for the decennial census. This "72-Year Rule" (92 Stat. 915; Public Law 95-416; October 5, 1978) restricts access to decennial census records to all but the individual named on the record or their legal heir.

For More information about the origin of the "72-Year Rule," see the following:

Letter from Census Bureau Director, Roy V. Peel to Archivist of the United States, Wayne C. Grover, concerning the 72-year lapse between collection and release of decennial census records, August 26, 1952. [<1.0 MB]
Letter from Archivist of the United States, Wayne C. Grover to Census Bureau Director Roy V. Peel, in reply to Peel's August 1952 letter (above), October 10, 1952. [<1.0 MB]
Letter from Assistant Attorney General Robert G. Dixon, Jr., to General Counsel, General Services Administration, William G. Casselman II, Esg., concerning the origins of the "72-year Rule" and its evolution to 1973, June 14, 1973. [<1.0 MB]

After 72 years, the census records are released to the public by the National Archives and Records Administration (NARA). In accordance with the “72-Year Rule”, the National Archives released the 1940 Census records on April 2, 2012, and most recently, the 1950 Census records were released on April 1, 2022.

For more information about the origins of the 72-Year Rule, see U.S. National Archives Pieces of History blog, "Census Records: The 72-Year Rule" published on January 20, 2022.