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Find more Koosmann 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 less person named Koosmann 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 people named Koosmann in the 1930 U.S. Census. In 1940, there were 4% less people named Koosmann in the United States. What was life like for them?

Picture the past for your ancestors.

In 1940, 22 people named Koosmann were living in the United States. In a snapshot:

  • 40%, or 2 people, lived in homes they rented
  • 60% owned their homes, valued on average at $3,000
  • For 9 females, Martha was the most common name
  • Most common occupation was farmer

Learn where they came from and where they went.

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

  • 4 were born in foreign countries
  • 17% were born in foreign countries
  • 70% were first-generation Americans
  • They most commonly lived in Wisconsin