97431 leans Republican by roughly 24 points: about 38% of voters vote Democratic and 62% Republican.
About 78% of adults in 97431 typically vote, above the U.S. average of about 62%. Among adults in 97431, ~30% vote Democratic, ~48% Republican, and ~22% don't vote. The map below shows estimated turnout by block group.
How 97431 compares
Among zip codes within 15 miles, 97431 leans more Republican than 8 of 9 neighbors.
97431 runs about 39 points more Republican than Oregon as a whole. Oregon leans Democratic overall, while 97431 is one of the few Republican-leaning pockets.
Politics vary noticeably by block within 97431. The north side is the most Republican-leaning (R+26) and the west side is the least Republican-leaning (R+14), a spread of about 12 points.
Why 97431 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 97431, not a ranked or complete list of what matters most.
97431 votes against the grain of Oregon. Oregon leans Democratic overall, while 97431 runs about 39 points more Republican. Rural areas vote Republican, and 97431 sits in the bottom quarter on density (about 6%, below 76% of zip codes). A high family-household share predicts Republican voting, and about 79% of households in 97431 are family households, above 91% of zip codes.
Developed land and Republican lean
Places with a rural land-use pattern tend to lean Republican; 97431, OR 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 97431 looks the way it does
Turnout in 97431 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 Oregon Secretary of State, Elections Division, 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.