Population and housing information extracted from decennial census Public Law 94-171 redistricting summary files for Washington state for years 2000 and 2010.

Washington state population density by county by decade 1900 to 2020.

Census 2010 population by race and Hispanic or Latino origin, for all ages and for 18 years and over for legislative districts based on Washington State Redistricting Commission plan L-JOINTSUB_3-2 as amended by Engrossed House Concurrent Resolution 4409.

Census 2010 population by race and Hispanic or Latino origin, for all ages and for 18 years and over for congressional districts based on Washington State Redistricting Commission plan C-JOINTSUB_2-1 as amended by Engrossed House Concurrent Resolution 4409.

Census 2010 population and housing for 2012 congressional districts based on Washington State Redistricting Commission plan C-JOINTSUB_2-1 as amended by Engrossed House Concurrent Resolution 4409.

Census 2010 population and housing for legislative districts based on Washington State Redistricting Commission plan L-JOINTSUB_3-2 as amended by Engrossed House Concurrent Resolution 4409.

Intercensal and postcensal population estimates for the state, counties and cities, 1990 to present.

Intercensal and postcensal estimates of population density by county 2000 to present.

Population change and rank by city, 2020 to present.

Population change and rank by county, 2020 to present.