99321 leans heavily Republican by roughly 32 points: about 34% of voters vote Democratic and 66% Republican.
About 26% of adults in 99321 typically vote, below the U.S. average of about 62%. Among adults in 99321, ~9% vote Democratic, ~17% Republican, and ~74% don't vote. The map below shows estimated turnout by block group.
How 99321 compares
Among zip codes within 15 miles, 99321 leans more Republican than 1 of 3 neighbors.
99321 runs about 50 points more Republican than Washington as a whole. Washington leans Democratic overall, while 99321 is one of the few Republican-leaning pockets.
Why 99321 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 99321, not a ranked or complete list of what matters most.
Rural areas vote Republican. About 6% of residents in 99321 live in densely developed areas, about 35 points below the Washington average of 41%. A high family-household share predicts Republican voting, and about 86% of households in 99321 are family households, above 98% of zip codes. 99321 runs against the grain of Washington, a Republican-leaning pocket in a Democratic-leaning state.
Preventive-care access and voter turnout
Places with limited routine preventive-care access tend to turn out at a lower rate; 99321, WA sits in the bottom quarter nationally on this measure. Dental visits do not drive turnout; the rate reflects income, insurance, and healthcare access, which line up with who votes.
Why turnout in 99321 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 99321 is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The uninsured rate here is about 31%, about 23 points above the Washington average of 9%. Renters vote less often than owners, and about 51% of households in 99321 rent, compared to around 32% in nearby zip codes. Low high-school completion lines up with lower turnout, and about 68% of adults in 99321 have completed high school, below 98% 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.