You've got family at Ancestry.

Find more Roos 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 255 more people named Roos 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 2,770 people named Roos in the 1930 U.S. Census. In 1940, there were 9% more people named Roos in the United States. What was life like for them?

Picture the past for your ancestors.

In 1940, 3,025 people named Roos were living in the United States. In a snapshot:

  • 124 reported their race as other than white
  • 49%, or 380 people, lived in homes they rented
  • Although 51% were female, the most common name for males was Robert
  • The average annual income was $1,215

Learn where they came from and where they went.

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

  • 14% migrated within the United States from 1935 to 1940
  • 573 were born in foreign countries
  • 38% were first-generation Americans
  • 21% were born in foreign countries