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Apportionment Calculator for US Census

Total House Seats:

July 2017 (Est)

State

Enter New Population

4,874,747 739,795 7,016,270 3,004,279 39,536,653 5,607,154 3,588,184 961,939 20,984,400 10,429,379 1,427,538 1,716,943 12,802,023 6,666,818 3,145,711 2,913,123 4,454,189 4,684,333 1,335,907 6,052,177 6,859,819 9,962,311 5,576,606 2,984,100 6,113,532 1,050,493 1,920,076 2,998,039 1,342,795 9,005,644 2,088,070 19,849,399 10,273,419 755,393 11,658,609 3,930,864 4,142,776 12,805,537 1,059,639 5,024,369 869,666 6,715,984 28,304,596 3,101,833 623,657 8,470,020 7,405,743 1,815,857 5,795,483 579,315 Alabama Alaska Arizona Arkansas California Colorado Connecticut Delaware Florida Georgia Hawaii Idaho Illinois Indiana Iowa Kansas Kentucky Louisiana Maine Maryland Massachusetts Michigan Minnesota Mississippi Missouri Montana Nebraska Nevada New Hampshire New Jersey New Mexico New York North Carolina North Dakota Ohio Oklahoma Oregon Pennsylvania Rhode Island South Carolina South Dakota Tennessee Texas Utah Vermont Virginia Washington West Virginia Wisconsin Wyoming

 

Instructions
This calculator illustrates how changes in state populations are reflected in the apportionment of House Seats for 2020 as compared to 2010. Entering in alternate population counts shows whether that would have made a difference.

To make a projection, you must enter a line-delimited list of population values in alpha order for all of the 50 US States. Do not include Washington, DC.

Data entry can be handled in two basic ways.

• Copy and paste the data from the first column (Jul 2017 Est) into the second column and submit these values.
• Copy and paste a line-delimited set of population values (e.g., a column from a spreadsheet) from another source, either an expert count or your own estimates, and submit these values.

In either of the above cases, values for individual states can be changed manually to model additional effects on apportionment.

Be sure your data set includes all 50 states and is sequenced in alpha order. A quick check of the population of New York (around 20 million) and Wyoming (less than 1 million) will help validate.

Contact . Census Support . Intranet . Michigan Population Studies Center . ISR . U of M . © 2018.