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Find more Dempsey relatives and grow your tree by exploring billions of historical records. Taken every decade since 1790, the U.S. Federal Census can tell you a lot about your family. For example, from 1930 to 1940 there were 1,314 less people named Dempsey in the United States — and some of them are likely related to you.

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Create, build, and explore your family tree.

What if you had a window into the history of your family? With historical records, you do. From home life to career, records help bring your relatives' experiences into focus. There were 14,146 people named Dempsey in the 1930 U.S. Census. In 1940, there were 9% less people named Dempsey in the United States. What was life like for them?

Picture the past for your ancestors.

In 1940, 12,832 people named Dempsey were living in the United States. In a snapshot:

  • 12,341 rented out rooms to boarders
  • 58%, or 1,816 people, lived in homes they rented
  • 3,805 were children
  • 19% of women had paying jobs

Learn where they came from and where they went.

As Dempsey families continued to grow, they left more tracks on the map:

  • 1,879 migrated within the United States from 1935 to 1940
  • 1,136 were born in foreign countries
  • They most commonly lived in Illinois
  • The most common mother tongue was German