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Find more Cios 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 the same number of people named Cios 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 21 people named Cios in the 1930 U.S. Census. In 1940, there were 0% more people named Cios in the United States. What was life like for them?

Picture the past for your ancestors.

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

  • On average men worked 26 hours a week
  • 52% were children
  • 20 rented out rooms to boarders
  • 95% rented out rooms to boarders

Learn where they came from and where they went.

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

  • 14 were first-generation Americans
  • They most commonly lived in Puerto Rico
  • 67% were first-generation Americans
  • Most immigrants originated from Poland