99329 is a Republican stronghold. About 25% of voters here vote Democratic and 75% Republican.
About 76% of adults in 99329 typically vote, above the U.S. average of about 62%. Among adults in 99329, ~19% vote Democratic, ~57% Republican, and ~24% don't vote. The map below shows estimated turnout by block group.
How 99329 compares
Among zip codes within 15 miles, 99329 leans more Republican than 3 of 4 neighbors.
99329 runs about 69 points more Republican than Washington as a whole. Washington leans Democratic overall, while 99329 is one of the few Republican-leaning pockets.
Why 99329 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 99329, not a ranked or complete list of what matters most.
Rural areas vote Republican. About 4% of residents in 99329 live in densely developed areas, about 37 points below the Washington average of 41%. A high family-household share predicts Republican voting, and about 79% of households in 99329 are family households, above 89% of zip codes. 99329 runs against the grain of Washington, a Republican-leaning pocket in a Democratic-leaning state.
Paved land cover and Republican lean
Places with little paved surface tend to lean Republican; 99329, WA sits in the bottom quarter nationally on this measure. Paved ground does not change how people vote; it mostly reflects how urban and built-up a place is.
Why turnout in 99329 looks the way it does
Areas with strong routine healthcare access turn out at higher rates. 99329 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%. High high-school completion lines up with higher turnout, and more than 99% of adults in 99329 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.