Apportionment is the process of dividing the 435 memberships, or seats, in the U.S. House of Representatives among the 50 states. At the conclusion of each decennial census, the results are used to calculate the number of House memberships to which each state is entitled. These maps show the changes to the number of Congressional seats for each state between apportionment based on the 2000 Census and apportionment based on the 2010 Census.
2010 Census Apportionment Results
Congressional seats were apportioned among the 50 states based on the 2010 Census population counts. Apportionment results from 1790 to 2010 are also shown.
2010 Decennial Census