99258 leans heavily Democratic by roughly 44 points: about 72% of voters vote Democratic and 28% Republican.
About 39% of adults in 99258 typically vote, below the U.S. average of about 62%. Among adults in 99258, ~28% vote Democratic, ~11% Republican, and ~61% don't vote. The map below shows estimated turnout by block group.
How 99258 compares
Among zip codes within 15 miles, 99258 leans more Democratic than 31 of 32 neighbors.
99258 runs about 25 points more Democratic than Washington as a whole.
Why 99258 leans the way it does
This analysis examined 14,881 data points per zip code to find what predicts political lean and turnout. The items below are a few correlations that stood out for 99258, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 95% of residents in 99258 live in densely developed areas, about 59 points above the U.S. average of 36%. High college attainment predicts Democratic voting, and 99258 sits in the top quarter (about 54%, above 91% of zip codes). A high never-married share predicts Democratic voting, and about 99% of adults in 99258 have never been married, in the top fraction of zip codes.
Walkability and Democratic lean
Places with a highly walkable street grid tend to lean Democratic; 99258, WA sits in the top tenth nationally on this measure. A walkable street grid does not change how people vote; it mostly reflects how urban a place is.
Why turnout in 99258 looks the way it does
Renters vote less often than owners. About 97% of households in 99258 rent, about 72 points above the U.S. average of 25%. Limited routine healthcare access lines up with lower turnout, and 99258 sits in the bottom quarter on routine-care measures. High-crime urban areas turn out at lower rates, and 99258 sits in the top 15% on a violent-crime measure. Learn more about the findings and methodology on the political spectrum map.
Nearby Zip Codes
Zip Codes with Similar Populations
Sources and methodology
Precinct-level voting records used to fit the model come from Washington Secretary of State, Elections, distributed by the Voting and Election Science Team. Demographic inputs come from the U.S. Census Bureau (ACS 5-year estimates and the 2020 Decennial Census). Health and environmental inputs come from the CDC (PLACES and the Environmental Justice Index). Land cover comes from the USGS and EPA. Election-day and lead-up weather come from PRISM 4km daily grids and the NOAA Global Historical Climatology Network. Mail-voting and election-administration patterns come from the MIT Election Lab's Survey of the Performance of American Elections. Block-group crime detail comes from CrimeGrade. Internet data and modeling support provided by ISPreports.org.
Modeling and analysis by the BestNeighborhood data science team. Full methodology and findings: political spectrum map.
Methodology reviewed by the BestNeighborhood data team. Last updated May 2026.