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Find more Oneill 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 1,950 more people named Oneill 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 6,874 people named Oneill in the 1930 U.S. Census. In 1940, there were 28% more people named Oneill in the United States. What was life like for them?

Picture the past for your ancestors.

In 1940, 8,824 people named Oneill were living in the United States. In a snapshot:

  • 5% were disabled
  • 2,500 were children
  • 23% of women had paying jobs
  • For 4,442 females, Anna was the most common name

Learn where they came from and where they went.

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

  • The most common mother tongue was Irish
  • They most commonly lived in New York
  • 11% migrated within the United States from 1935 to 1940
  • 34% were first-generation Americans