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Find more Cos 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 104 more people named Cos 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 140 people named Cos in the 1930 U.S. Census. In 1940, there were 74% more people named Cos in the United States. What was life like for them?

Picture the past for your ancestors.

In 1940, 244 people named Cos were living in the United States. In a snapshot:

  • 13% of women had paying jobs
  • For 102 females, May was the most common name
  • The average annual income was $1,007
  • 94 were children

Learn where they came from and where they went.

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

  • 17% migrated within the United States from 1935 to 1940
  • 20% were first-generation Americans
  • 23% were born in foreign countries
  • They most commonly lived in New York