99013 leans slightly Democratic by roughly 6 points: about 53% of voters vote Democratic and 47% Republican.
About 67% of adults in 99013 typically vote, near the U.S. average of about 62%. Among adults in 99013, ~36% vote Democratic, ~32% Republican, and ~32% don't vote. The map below shows estimated turnout by block group.
How 99013 compares
Among zip codes within 15 miles, 99013 leans more Democratic than 5 of 6 neighbors.
99013 runs about 12 points more Republican than Washington as a whole.
Politics vary noticeably by block within 99013. The north side runs the most Democratic (D+46) and the southwest side runs the most Republican (R+61), a spread of about 107 points.
Why 99013 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 99013, not a ranked or complete list of what matters most.
Areas with many never-married adults vote Democratic. About 33% of adults in 99013 have never been married, modestly above similar-sized zip codes (around 27%).
Population density and Republican lean
Places with low population density tend to lean Republican; 99013, WA sits in the bottom quarter nationally on this measure.
Why turnout in 99013 looks the way it does
Turnout in 99013 sits close to the national pattern. Routine healthcare access, homeownership, education, and food security all land near their national averages here. 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.