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Find more Costlo 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 3 less people named Costlo 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 13 people named Costlo in the 1930 U.S. Census. In 1940, there were 23% less people named Costlo in the United States. What was life like for them?

Picture the past for your ancestors.

In 1940, 10 people named Costlo were living in the United States. In a snapshot:

  • The youngest was 35 and the oldest was 81
  • 3 were disabled
  • 25%, or 1 person, lived in homes they rented
  • 40% of adults were unmarried

Learn where they came from and where they went.

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

  • 23% were first-generation Americans
  • Most immigrants originated from Northern Ireland
  • 2 were born in foreign countries
  • 3 migrated within the United States from 1935 to 1940