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Searching for Your Ancestors: The 1940 US Census

by Unknown User on 2020-06-09T09:00:00-04:00 | 0 Comments

undefinedDid you know 87% of Americans today can trace at least one ancestor back to the 1940 Census? Approximately 21.2 million people in the US and Puerto Rico alive today were eligible to be counted eighty years ago.

 The 1940 Census results were released to the general public on April 2, 2012.  The Census Bureau allows for 72 years, estimated to be the average human lifespan, to pass before the release of government records. The most effective way to search them is knowing your ancestor's enumeration district. The census records in 2020, are still being indexed by name.   

In 1940, census planners divided the country into 147,000 enumeration districts for the 120,000 census works.  These were geographic areas designed to allow a census taker (enumerator) to visit every house in the district within a two-week period.  Census workers were instructed to “visit every house, building, tent, cabin, hut, or other place in which any person might live or stay, to insure that no person is omitted from the enumeration."

The work involved in the 1940 Census incurred the US government a total cost of $67.5 million, 1 billion in today's dollars.  It tallied the population of the country at 131,669,275 for the continental US. This represented an increase of 7.2 percent for the continental U.S. since the 1930 Census. Adding Hawaii, Alaska, Puerto Rico, Guam, the U.S. Virgin Islands, American Samoa, and the Panama Canal Zone brought the population total to 134,176,298. New questions for 1940 included residence five years earlier, income, highest level of school completed and unemployment history. Questions brought on by the Great Depression

  • address
  • home value and whether owned or rented
  • name of each person whose usual place of residence on 1 April 1940 would be in the householdundefined
  • color or race
  • age at last birthday
  • marital status
  • education
  • place of birth
  • citizenship
  • residence on 1 April 1935
  • employment status for those 14 and older (several questions)
  • occupation and number of weeks worked full-time in 1939
  • income in 1939


Interesting facts about the 1940 Census: 

  • New York was the most commonly listed birth state.  New York City had a population of 7.5 million people. 
  • The top five foreign countries listed as a birthplace were Italy, Germany, Russia, Poland, and England. 
  • Mary and John were the most common given names appearing in the 1940 census
  • The top five surnames in the 1940 census were Smith, Johnson, Brown, Williams, and Jones. 
  • 5% of adults had a bachelor's degree.  $956 was the median income for men.  $592 for women.  
  • There were 5.1 million farmers in 1940 in the continental United States. 
  • Two women tied for the oldest person in the census, both Mary Dilworth of Oxford, Mississippi and Candido Vega Y Torres of Guayana, Puerto Rico, listed their ages as 119.

Before we know it, the 1950 US Census records will be released in April of 2022.  If you have any questions on navigating the US Census, reach out to a librarian via chat or phone.  If interested in knowing more, join me for Searching for Your Ancestors: Getting More from the Census Records, on Thursday, June 18 at 11 a.m.


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