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2020 Census data releases

2020 Census apportionment data

The apportionment population represents the first official 2020 Census numbers released by the U.S. Census Bureau. The apportionment counts are used to distribute the 435 seats of the House of  representative among the 50 states based on each state’s population. The apportionment population includes the resident population plus the overseas population consisting of military and federal civilian employees and their dependents living with them who could be allocated to a state.

Summary for Washington state

  • The apportionment population for Washington state is 7,715,946.
  • Based on the apportionment population, Washington will have a total of 10 seats in the House of Representative, the same as the past decade.
  • The resident population for Washington state is 7,705,281 making Washington the 13th most populous state in the country.
  • Washington’s resident population increased by 14.6 percent or 980,741 people between 2010 and 2020 outpacing the national growth rate of 7.4 percent.
  • The overseas population for Washington is 10,665.
  • More on 2020 Census apportionment.

Operational metrics from the 2020 Census

2020 Census geographic files

Washington’s updated TIGER/Line Shapefiles, containing geographic entity codes (GEOIDs) that can be linked to the Census Bureau’s demographic data, were released on February 2, 2021, and can be found here.

What's Next?

2020 Census redistricting data (Public Law 94-171)

The U.S. Census Bureau announced it will deliver redistricting data to all states by late August. The redistricting data will include counts of population by race, ethnicity (Hispanic or Latino origin), voting age, housing occupancy status, and group quarters population down to the census block level. This data will be used to redraw legislative boundaries and boundaries of other jurisdictions that elect representatives using internal districts (counties, cities, schools, ports, and fire districts). Census data will also be used to distribute more than $1.5 trillion in federal funds to states, counties and cities, and to influence public and private decision-making related to education, healthcare, transportation and many more issues.


Last updated
Tuesday, April 27, 2021
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