98903 leans Republican by roughly 18 points: about 41% of voters vote Democratic and 59% Republican.
About 60% of adults in 98903 typically vote, near the U.S. average of about 62%. Among adults in 98903, ~25% vote Democratic, ~35% Republican, and ~40% don't vote. The map below shows estimated turnout by block group.
How 98903 compares
Among zip codes within 15 miles, 98903 leans more Republican than 7 of 11 neighbors.
98903 runs about 37 points more Republican than Washington as a whole. Washington leans Democratic overall, while 98903 is one of the few Republican-leaning pockets.
Politics vary noticeably by block within 98903. The south side is the most split-leaning (R+44) and the east side is the least split-leaning (Even), a spread of about 43 points.
Why 98903 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 98903, not a ranked or complete list of what matters most.
98903 votes against the grain of Washington. Washington leans Democratic overall, while 98903 runs about 37 points more Republican.
High-school completion, developed land, and voter turnout
Places that combine low high-school-completion share and a heavily developed built environment tend to turn out at a lower rate, as 98903, WA does.
Why turnout in 98903 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 98903 is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. 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.