Voter turnout and registration maps
Countywide turnout and registration maps are created annually after certification of the general election of that year and are produced as pdfs and interactive maps.
Voter turnout maps
The interactive map shows the percentage of voter turnout by area or precinct for the 2010-2021 general elections. The map shows turnout by year for all voting precincts. The lighter colors represent lower percentage turnout, the darker colors represent higher percentage turnout.
View interactive map
Voter registration maps
Downloadable voter registration mapsPercentage of registered voters of eligible voting age (18 and up) by census tract
2020 Census Tracts
2010 Census Tracts
Maps show the percent of registered voters by census tract. They represent the number of people registered to vote as compared to the voting population, age 18 and over.
Total number of registered voters based on registered address at the time of the annual general election.
In 2020, the total King County population for age 18 and over was 1,813,470. Estimated population growth used in these projections are from the US Census Bureau and the Washington Office of Financial Management using the 2020 census tracts.
- 2020-2021: 0.77% population increase
In 2010, the total King County population for age 18 and over was 1,517,747. Estimated population growth used in these projections are from the US Census Bureau and the Washington Office of Financial Management using the 2010 census tracts.
- 2010-2019: 17% population increase
- 2010-2018: 14% population increase
- 2010-2016 & 2017: 11% population increase
- 2010-2015: 9% population increase
- 2010-2014: 7% population increase
- 2010-2013: 6% population increase
The interactive map shows the percentage of registered voters by census tracts in 2020 for the 2020-2021 general elections and percent of registered voters by census tracts in 2010 for the 2013-2019 general elections. King County has an overall 80 percent registration rate, the lighter colors represent a relatively low percent registered; the darker colors represent a relatively high percent registered.
View interactive map