97857 leans heavily Republican by roughly 36 points: about 32% of voters vote Democratic and 68% Republican.
About 74% of adults in 97857 typically vote, above the U.S. average of about 62%. Among adults in 97857, ~24% vote Democratic, ~50% Republican, and ~26% don't vote. The map below shows estimated turnout by block group.
How 97857 compares
Among zip codes within 15 miles, 97857 leans more Republican than 2 of 3 neighbors.
97857 runs about 50 points more Republican than Oregon as a whole. Oregon leans Democratic overall, while 97857 is one of the few Republican-leaning pockets.
Politics vary noticeably by block within 97857. The north side is the most Republican-leaning (R+43) and the south side is the least Republican-leaning (R+10), a spread of about 34 points.
Why 97857 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 97857, not a ranked or complete list of what matters most.
97857 votes against the grain of Oregon. Oregon leans Democratic overall, while 97857 runs about 50 points more Republican. Rural areas vote Republican, and 97857 sits in the bottom quarter on density (about 1%, below 98% of zip codes).
Paved land cover and Republican lean
Places with little paved surface tend to lean Republican; 97857, OR sits in the bottom tenth nationally on this measure. Paved ground does not change how people vote; it mostly reflects how urban and built-up a place is.
Why turnout in 97857 looks the way it does
Areas with strong routine healthcare access turn out at higher rates. 97857 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%. High high-school completion lines up with higher turnout, and about 97% of adults in 97857 have completed high school, above 91% 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 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.