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Find more Treacy 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 10 more people named Treacy 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 536 people named Treacy in the 1930 U.S. Census. In 1940, there were 2% more people named Treacy in the United States. What was life like for them?

Picture the past for your ancestors.

In 1940, 546 people named Treacy were living in the United States. In a snapshot:

  • 5% were disabled
  • The youngest was 1 and the oldest was 89
  • 1 reported their race as other than white
  • Most common occupation was clerk

Learn where they came from and where they went.

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

  • The most common mother tongue was Italian
  • 252 were first-generation Americans
  • They most commonly lived in Illinois
  • 56 migrated within the United States from 1935 to 1940