Redistricting data will be released in legacy format on August 12. OFM plans to post data in easy to use excel or csv formats within a few days of its release.

The redistricting data includes 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.

Data tables

The tables included herein have been created by the Washington State Redistricting Commission, ESRI and CityGate GIS. They are based on the U.S. Census Bureau’s 2020 Redistricting Data Summary File, also known as the Public Law 94-171 file. In accordance with RCW 44.05.140, the population, race and ethnicity data were adjusted at the Census block level in a manner that reflects the last known place of residence of inmates incarcerated in state adult correctional facilities, persons committed to receive involuntary behavioral health treatment, and persons residing or placed in juvenile justice facilities.

RCW 44.05.140 adjusted Census block, county and voting districts.

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

• Introduction to the Quality Indicators: Operational Metrics
• Quality Metrics Release

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.