99343 is a Republican stronghold. About 22% of voters here vote Democratic and 78% Republican.
About 47% of adults in 99343 typically vote, below the U.S. average of about 62%. Among adults in 99343, ~10% vote Democratic, ~36% Republican, and ~54% don't vote. The map below shows estimated turnout by block group.
How 99343 compares
99343 sits in a sparsely populated area with few comparable zip codes nearby.
99343 runs about 75 points more Republican than Washington as a whole. Washington leans Democratic overall, while 99343 is one of the few Republican-leaning pockets.
Politics vary noticeably by block within 99343. The northwest side is the most Republican-leaning (R+71) and the northeast side is the least Republican-leaning (R+49), a spread of about 22 points.
Why 99343 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 99343, not a ranked or complete list of what matters most.
99343 votes against the grain of Washington. Washington leans Democratic overall, while 99343 runs about 75 points more Republican. A high family-household share predicts Republican voting, and about 86% of households in 99343 are family households, above 98% of zip codes.
Population density, never-married share, and Republican lean
Places that combine low population density and a never-married-heavy adult population tend to lean Republican, as 99343, WA does.
Why turnout in 99343 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 99343 is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The dental-visit rate here is about 50%, about 15 points below the Washington average of 65%. Low high-school completion lines up with lower turnout, and about 65% of adults in 99343 have completed high school, in the bottom 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.