You've got family at Ancestry.

Find more Kroupa 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 17 more people named Kroupa in the United States — and some of them are likely related to you.

Start a tree and connect with your family.


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 526 people named Kroupa in the 1930 U.S. Census. In 1940, there were 3% more people named Kroupa in the United States. What was life like for them?

Picture the past for your ancestors.

In 1940, 543 people named Kroupa were living in the United States. In a snapshot:

  • The average annual income was $1,030
  • The typical household was 3 people
  • 55 women had paying jobs
  • The youngest was less than a year and the oldest was 87

Learn where they came from and where they went.

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

  • 24% were born in foreign countries
  • The most common mother tongue was Czech
  • 248 were first-generation Americans
  • 14% migrated within the United States from 1935 to 1940