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Find more Riis 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 36 less people named Riis 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 155 people named Riis in the 1930 U.S. Census. In 1940, there were 23% less people named Riis in the United States. What was life like for them?

Picture the past for your ancestors.

In 1940, 119 people named Riis were living in the United States. In a snapshot:

  • 28% were children
  • 33 were children
  • The youngest was 1 and the oldest was 78
  • On average men worked 45 hours a week

Learn where they came from and where they went.

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

  • Most mothers originated from Norway
  • They most commonly lived in Illinois
  • 61 were first-generation Americans
  • Most immigrants originated from Denmark