United States congressional apportionment information
How 435 seats are distributed to 50 states
Allocation of seats by state, as percentage of overall number of representatives in the House, 1789–2020 census
United States congressional apportionment is the process[1] by which seats in the United States House of Representatives are distributed among the 50 states according to the most recent decennial census mandated by the United States Constitution. After each state is assigned one seat in the House, most states are then apportioned a number of additional seats which roughly corresponds to its share of the aggregate population of the 50 states.[2] Every state is constitutionally guaranteed at least one seat in the House and two seats in the Senate, regardless of population.
The number of voting seats in the House of Representatives has been 435 since 1913, capped at that number by the Reapportionment Act of 1929—except for a temporary (1959–1962) increase to 437 when Alaska and Hawaii were admitted into the Union.[3] The Huntington–Hill method of equal proportions has been used to distribute the seats among the states since the 1940 census reapportionment.[1][4] Federal law requires the Clerk of the United States House of Representatives to notify each state government of the number of seats apportioned to the state no later than January 25 of the year immediately following each decennial census.
The size of a state's total congressional delegation (which in addition to representative(s) includes 2 senators for each state) also determines the size of its representation in the U.S. Electoral College, which elects the U.S. president.
^ abKristin D. Burnett (November 1, 2011). "Congressional Apportionment (2010 Census Briefs C2010BR-08)" (PDF). U.S. Department of Commerce, Economics and Statistics Administration. Retrieved February 25, 2015.
^The populations of Washington, D.C. and federal territories are not included in this figure.
^Public Law 62-5 of 1911.
^Cite error: The named reference ams was invoked but never defined (see the help page).
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