99130 leans heavily Republican by roughly 48 points: about 26% of voters vote Democratic and 74% Republican.
About 51% of adults in 99130 typically vote, below the U.S. average of about 62%. Among adults in 99130, ~13% vote Democratic, ~38% Republican, and ~49% don't vote. The map below shows estimated turnout by block group.
How 99130 compares
Among zip codes within 15 miles, 99130 leans more Republican than 4 of 10 neighbors.
99130 runs about 67 points more Republican than Washington as a whole. Washington leans Democratic overall, while 99130 is one of the few Republican-leaning pockets.
Why 99130 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 99130, not a ranked or complete list of what matters most.
99130 votes against the grain of Washington. Washington leans Democratic overall, while 99130 runs about 67 points more Republican. Rural areas vote Republican, and 99130 sits in the bottom quarter on density (about 4%, below 90% of zip codes).
Developed land and Republican lean
Places with a rural land-use pattern tend to lean Republican; 99130, WA sits in the bottom quarter nationally on this measure. Developed land does not change how people vote; it mostly reflects how urban a place is.
Why turnout in 99130 looks the way it does
Areas with strong routine healthcare access turn out at higher rates. 99130 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 73%, about 13 points above the U.S. average of 60%. 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.