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You've got family at Ancestry.

Find more Sempolski 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 4 more people named Sempolski 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 8 people named Sempolski in the 1930 U.S. Census. In 1940, there were 50% more people named Sempolski in the United States. What was life like for them?

Picture the past for your ancestors.

In 1940, 12 people named Sempolski were living in the United States. In a snapshot:

  • For 8 females, Martha was the most common name
  • The average annual income was $522
  • 100% rented out rooms to boarders
  • 25% of women had paying jobs

Learn where they came from and where they went.

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

  • 3 were born in foreign countries
  • 38% were born in foreign countries
  • 5 were first-generation Americans
  • 62% were first-generation Americans