U.S. Department of Commerce

Congressional Apportionment

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How Long It's Been Done

Thomas Jefferson

As prescribed by the Constitution, the first decennial census was conducted in 1790. Thomas Jefferson, Secretary of State at the time, directed the enumeration. Since then, the census has been taken in each year ending in the zero digit. Thus, the most recent enumeration (the 2010 Census) was the first census of the 21st century.


Source: U.S. Census Bureau | Congressional Apportionment |  Last Revised: 2013-02-04T07:44:34.737-05:00