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Find more Duffy 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 1,164 less people named Duffy 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 24,876 people named Duffy in the 1930 U.S. Census. In 1940, there were 5% less people named Duffy in the United States. What was life like for them?

Picture the past for your ancestors.

In 1940, 23,712 people named Duffy were living in the United States. In a snapshot:

  • On average men worked 41 hours a week
  • 2% reported their race as other than white
  • 33% of adults were unmarried
  • 6,428 were children

Learn where they came from and where they went.

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

  • Most immigrants originated from Ireland
  • 8,725 were first-generation Americans
  • Most mothers originated from New York
  • They most commonly lived in New York