You've got family at Ancestry.

Find more Kosakowski 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 67 more people named Kosakowski 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 359 people named Kosakowski in the 1930 U.S. Census. In 1940, there were 19% more people named Kosakowski in the United States. What was life like for them?

Picture the past for your ancestors.

In 1940, 426 people named Kosakowski were living in the United States. In a snapshot:

  • 33% were children
  • Although 47% were female, the most common name for males was Anthony
  • 104 adults were unmarried
  • 415 rented out rooms to boarders

Learn where they came from and where they went.

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

  • Most mothers originated from Lithuania
  • 237 were first-generation Americans
  • 23 migrated within the United States from 1935 to 1940
  • Most fathers originated from Lithuania