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Find more Mcmahon 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 2,050 less people named Mcmahon 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 23,316 people named Mcmahon in the 1930 U.S. Census. In 1940, there were 9% less people named Mcmahon in the United States. What was life like for them?

Picture the past for your ancestors.

In 1940, 21,266 people named Mcmahon were living in the United States. In a snapshot:

  • 5,006 adults were unmarried
  • Most common occupation was farmer
  • 22% of women had paying jobs
  • 5% were disabled

Learn where they came from and where they went.

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

  • Most mothers originated from New York
  • They most commonly lived in Illinois
  • 2,798 migrated within the United States from 1935 to 1940
  • The most common mother tongue was Polish