99114 leans heavily Republican by roughly 38 points: about 31% of voters vote Democratic and 69% Republican.
About 76% of adults in 99114 typically vote, above the U.S. average of about 62%. Among adults in 99114, ~24% vote Democratic, ~53% Republican, and ~23% don't vote. The map below shows estimated turnout by block group.
How 99114 compares
Among zip codes within 15 miles, 99114 is the least Republican-leaning.
99114 runs about 56 points more Republican than Washington as a whole. Washington leans Democratic overall, while 99114 is one of the few Republican-leaning pockets.
Politics vary noticeably by block within 99114. The northwest side is the most Republican-leaning (R+49) and the west side is the least Republican-leaning (R+29), a spread of about 20 points.
Why 99114 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 99114, not a ranked or complete list of what matters most.
99114 votes against the grain of Washington. Washington leans Democratic overall, while 99114 runs about 56 points more Republican.
Park access and Democratic lean
Places with heavy park coverage tend to lean Democratic; 99114, WA sits in the top quarter nationally on this measure. Park access does not change how people vote; it tends to track denser, higher-income areas.
Why turnout in 99114 looks the way it does
Turnout in 99114 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.