98337 leans heavily Democratic by roughly 40 points: about 70% of voters vote Democratic and 30% Republican.
About 56% of adults in 98337 typically vote, below the U.S. average of about 62%. Among adults in 98337, ~39% vote Democratic, ~17% Republican, and ~44% don't vote. The map below shows estimated turnout by block group.
How 98337 compares
Among zip codes within 15 miles, 98337 leans more Democratic than 17 of 35 neighbors.
98337 runs about 21 points more Democratic than Washington as a whole.
Politics vary noticeably by block within 98337. The northeast side is the most Democratic-leaning (D+49) and the west side is the least Democratic-leaning (D+27), a spread of about 22 points.
Why 98337 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 98337, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 79% of residents in 98337 live in densely developed areas, about 42 points above the U.S. average of 36%. A high never-married share predicts Democratic voting, and about 50% of adults in 98337 have never been married, above 95% of zip codes.
Walkability and Democratic lean
Places with a highly walkable street grid tend to lean Democratic; 98337, 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 98337 looks the way it does
Renters vote less often than owners. About 56% of households in 98337 rent, about 31 points above the U.S. average of 25%. High-crime urban areas turn out at lower rates, and 98337 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.