The U.S. Census counts every resident in the United States. It is mandated by Article I, Section 2 of the Constitution and takes place every 10 years. The data collected by the decennial census determine the number of seats each state has in the U.S. House of Representatives and is also used to distribute billions in federal funds to local communities. The 2010 Census represented the most massive participation movement ever witnessed in our country.
The Census Bureau's mission is to serve as the leading source of quality data about the nation's people and economy.
"The actual enumeration shall be made within three years after the first meeting of the Congress of the United States, and within every subsequent term of 10 years, in such manner as they shall by Law direct."
-- Article I, Section 2 of the Constitution of the United States
"Your source for population, housing, economic, and geographic information." Use American FactFinder to discover data from key Census surveys, including the American Community Survey, the Decennial Census, the Economic Survey, to name but a few. A complete list of Census surveys discoverable in American FactFinder is available here.