An official website of the United States government.

This is not the current EPA website. To navigate to the current EPA website, please go to This website is historical material reflecting the EPA website as it existed on January 19, 2021. This website is no longer updated and links to external websites and some internal pages may not work. More information »

America's Children and the Environment (ACE)

Census: Intercensal and Postcensal Data

The U.S. Census Bureau collects detailed population data for the entire United States every 10 years. These data are combined with birth, death, migration, and net international immigration data to estimate populations for the years between (intercensal) or after (postcensal) censuses.

You may need a PDF reader to view some of the files on this page. See EPA’s About PDF page to learn more.