You've got family at Ancestry.

Find more Lonergan 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 91 less people named Lonergan 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 2,314 people named Lonergan in the 1930 U.S. Census. In 1940, there were 4% less people named Lonergan in the United States. What was life like for them?

Picture the past for your ancestors.

In 1940, 2,223 people named Lonergan were living in the United States. In a snapshot:

  • 2,123 rented out rooms to boarders
  • 26% were children
  • Most common occupation was salesman
  • 104 were disabled

Learn where they came from and where they went.

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

  • 244 migrated within the United States from 1935 to 1940
  • Most mothers originated from Illinois
  • They most commonly lived in New York
  • The most common mother tongue was Italian