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Find more Marczak 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 163 more people named Marczak in the United States — and some of them are likely related to you.

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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 202 people named Marczak in the 1930 U.S. Census. In 1940, there were 81% more people named Marczak in the United States. What was life like for them?

Picture the past for your ancestors.

In 1940, 365 people named Marczak were living in the United States. In a snapshot:

  • The average annual income was $941
  • 125 were children
  • The youngest was less than a year and the oldest was 81
  • Most common occupation was machinist

Learn where they came from and where they went.

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

  • 35% were born in foreign countries
  • They most commonly lived in Illinois
  • 114 were first-generation Americans
  • The most common mother tongue was Polish