You've got family at Ancestry.

Find more Dec 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 27 less people named Dec 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 308 people named Dec in the 1930 U.S. Census. In 1940, there were 9% less people named Dec in the United States. What was life like for them?

Picture the past for your ancestors.

In 1940, 281 people named Dec were living in the United States. In a snapshot:

  • For 121 females, Helen was the most common name
  • 3 reported their race as other than white
  • 54%, or 34 people, lived in homes they rented
  • 268 rented out rooms to boarders

Learn where they came from and where they went.

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

  • 62% were first-generation Americans
  • 3% migrated within the United States from 1935 to 1940
  • 109 were born in foreign countries
  • Most immigrants originated from Poland