99006 leans heavily Republican by roughly 40 points: about 30% of voters vote Democratic and 70% Republican.
About 81% of adults in 99006 typically vote, above the U.S. average of about 62%. Among adults in 99006, ~24% vote Democratic, ~57% Republican, and ~19% don't vote. The map below shows estimated turnout by block group.
How 99006 compares
Among zip codes within 15 miles, 99006 leans more Republican than 6 of 11 neighbors.
99006 runs about 58 points more Republican than Washington as a whole. Washington leans Democratic overall, while 99006 is one of the few Republican-leaning pockets.
Politics vary noticeably by block within 99006. The northwest side is the most Republican-leaning (R+45) and the north side is the least Republican-leaning (R+34), a spread of about 11 points.
Why 99006 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 99006, not a ranked or complete list of what matters most.
99006 votes against the grain of Washington. Washington leans Democratic overall, while 99006 runs about 58 points more Republican.
Cancer-screening access and voter turnout
Places with high colon-cancer-screening access tend to turn out at a higher rate; 99006, WA sits above the national average on this measure. Cancer screening does not drive turnout; it reflects income, insurance, and healthcare access.
Why turnout in 99006 looks the way it does
Turnout in 99006 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.