The first United States Census was conducted on August 1, 1790. At that time, there were 3,939,326 people living in the 16 states and Ohio Territory. The 2010 census shows 308,745,538 people living in the U.S.
Interested in genealogy? Want to find your ancestors in the census? Come to the library and use Ancestry Library Edition. You can also use HeritageQuest from home. All you need is your library card and a computer.