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2020 Census Population Counts for Apportionment are Now Available

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 seats to which each state is entitled. Each of the 50 states is entitled to a minimum of one seat in the U.S. House of Representatives.

The 2020 Census apportionment population includes the resident population of the 50 states, plus a count of the U.S. military personnel and federal civilian employees living outside the United States (and their dependents living with them) who can be allocated to a home state. The population of the District of Columbia is not included in the apportionment population.

The calculation methods used through most of the 20th century have been based upon the use of a mathematically determined priority listing of states. Adopted by Congress in 1941 and used each census thereafter, the method of equal proportions also results in a listing of the states according to a priority value—calculated by dividing the population of each state by the geometric mean of its current and next seats—that assigns seats 51 through 435. For more information, see Computing Apportionment.

Table 1. Apportionment Population and Number of Representatives by State: 2020 Census

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Table 2. Resident Population for the 50 States, the District of Columbia, and Puerto Rico: 2020 Census

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Table 3. Overseas Population for the 50 States and the District of Columbia: 2020 Census

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Additional Data

Table A. Apportionment Population, Resident Population, and Overseas Population: 2020 Census and 2010 Census

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Table B1. Top Ten Runner-Up States to Almost Gain Another Congressional Seat: 2020 Census

Table B2. Additional Apportionment Population Needed for First Runner-Up State to Gain Another Congressional Seat: 1940 to 2020

Table C1. Number of Seats in U.S. House of Representatives by State: 1910 to 2020

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Table C2. Apportionment Population and Number of Seats in U.S. House of Representatives by State: 1910 to 2020

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Table D1. Number of Seats Gained and Lost in U.S. House of Representatives by State: 2020 Census

Table D2. Number of Seats Gained and Lost in U.S. House of Representatives by State: 2010 Census

Table E. Numeric and Percent Change in Resident Population of the 50 States, the District of Columbia, and Puerto Rico: 2020 Census and 2010 Census

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Number of U.S. Military Personnel, Federal Civilian Personnel, and their Dependents in the Overseas Population for the 50 States and the District of Columbia: 2020 Census

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Priority Values for 2020 Census Apportionment

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Visualizations

Related Information


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