There were 132 million people living in the United States in 1940, and that census is the most comprehensive, largest, and most recent set of records to include full names of all individuals living in the United States at the time the census was taken. In addition, the 1940 United States Federal Census asked several new questions. 5% of respondents were asked the birth place of their mother and father, their usual occupation, and and questions related to marriage for all women who had been married. The results of these new and unique questions will open up nearly endless possibilities for further researching family trees and genealogy. If you are looking to further understand who your ancestors were, visit 1940 census on Family Search for more information and to access links to view the census results.