Every 10 years, the United States government is required to count all of its citizens. This is called the Decennial Census. The government not only tries to count us, but gather other information about us too.
The Census Bureau put some of this collected data in one convenient place! You can use American FactFinder 2 to download data from the 2000 and 2010 censuses. For earlier censuses, there are several online sources from which to choose such as Social Explorer.
Interested in helping improve the American Community Survey? The Committee on National Statistics is hosting a 2 day workshop about ACS. The workshop will be held in Washington, D.C. on September 26-27, 2018 at the Keck Center. See their page for more information.
Just about every subject can use Census data. The following are the subjects that are directly related to Census data collection.