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2020 Census: Apportionment of the U.S. House of Representatives
2020 Census: Apportionment of the U.S. House of Representatives
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. This map shows the changes to the number of Congressional seats for each state between apportionment based on the 2010 Census and apportionment based on the 2020 Census.
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Related Maps
Related Information
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Table2020 Census Apportionment ResultsCongressional seats were apportioned among the 50 states based on the 2020 Census population counts. Apportionment results from 1790 to 2020 are also shown.
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VisualizationHistorical Apportionment Data Map (Interactive)This interactive tool enables users to view more than 10 decades of apportionment and population data.
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TableHistorical Apportionment Data (1910-2020)Historical apportionment data for the nation and states.
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Congressional ApportionmentInformation about congressional apportionment for the current and past Decennial Censuses.
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Decennial Census of Population and HousingThe 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.
Source and References
2020 Decennial Census
Page Last Revised - October 8, 2021
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