98303 leans slightly Democratic by roughly 12 points: about 56% of voters vote Democratic and 44% Republican.
About 78% of adults in 98303 typically vote, above the U.S. average of about 62%. Among adults in 98303, ~44% vote Democratic, ~34% Republican, and ~22% don't vote. The map below shows estimated turnout by block group.
How 98303 compares
Among zip codes within 15 miles, 98303 leans more Democratic than 9 of 36 neighbors.
98303 runs about 5 points more Republican than Washington as a whole.
Why 98303 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 98303, not a ranked or complete list of what matters most.
Areas with high college attainment vote Democratic. About 44% of adults in 98303 hold a bachelor's degree, about 16 points above the U.S. average of 28%.
High-school completion, developed land, and voter turnout
Places that combine high-school-completion-heavy adults and a rural land-use pattern tend to turn out at a higher rate, as 98303, WA does.
Why turnout in 98303 looks the way it does
Areas with strong routine healthcare access turn out at higher rates. 98303 is in the top quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The dental-visit rate here is about 67%, about 7 points above the U.S. average of 60%. Homeowners vote more often than renters, and about 97% of households in 98303 own their home, compared to around 61% in nearby zip codes. High high-school completion lines up with higher turnout, and more than 99% of adults in 98303 have completed high school, in the top fraction of zip codes. 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.