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Find more Martensen 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 294 more people named Martensen 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 538 people named Martensen in the 1930 U.S. Census. In 1940, there were 55% more people named Martensen in the United States. What was life like for them?

Picture the past for your ancestors.

In 1940, 832 people named Martensen were living in the United States. In a snapshot:

  • Most common occupation was farming
  • 28 were disabled
  • The youngest was 1 and the oldest was 82
  • On average men worked 45 hours a week

Learn where they came from and where they went.

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

  • They most commonly lived in Nebraska
  • The most common mother tongue was German
  • 224 were first-generation Americans
  • Most immigrants originated from Denmark