97840 leans heavily Republican by roughly 38 points: about 31% of voters vote Democratic and 69% Republican.
About 55% of adults in 97840 typically vote, below the U.S. average of about 62%. Among adults in 97840, ~17% vote Democratic, ~38% Republican, and ~45% don't vote. The map below shows estimated turnout by block group.
How 97840 compares
97840 runs about 53 points more Republican than Oregon as a whole. Oregon leans Democratic overall, while 97840 is one of the few Republican-leaning pockets.
Why 97840 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 97840, not a ranked or complete list of what matters most.
Rural areas with a high white share vote Republican. 97840 sits in the bottom quarter on density and more than 99% of residents are non-Hispanic white, about 22 points above the Oregon average of 78%. 97840 runs against the grain of Oregon, a Republican-leaning pocket in a Democratic-leaning state.
Developed land and Republican lean
Places with a rural land-use pattern tend to lean Republican; 97840, OR sits in the bottom tenth nationally on this measure. Developed land does not change how people vote; it mostly reflects how urban a place is.
Why turnout in 97840 looks the way it does
Areas with strong routine healthcare access turn out at higher rates. 97840 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 65%, about 5 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 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.