97028 leans slightly Democratic by roughly 6 points: about 53% of voters vote Democratic and 47% Republican.
About 60% of adults in 97028 typically vote, near the U.S. average of about 62%. Among adults in 97028, ~32% vote Democratic, ~28% Republican, and ~40% don't vote. The map below shows estimated turnout by block group.
How 97028 compares
Among zip codes within 15 miles, 97028 is the most Democratic-leaning.
97028 runs about 7 points more Republican than Oregon as a whole.
Why 97028 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 97028, not a ranked or complete list of what matters most.
Areas with many never-married adults vote Democratic. About 42% of adults in 97028 have never been married, modestly above similar-sized zip codes (around 32%). High college attainment predicts Democratic voting, and 97028 sits in the top quarter (about 37%, above 77% of zip codes).
Preventive-care access and voter turnout
Places with strong routine preventive-care access tend to turn out at a higher rate; 97028, OR sits in the top quarter nationally on this measure. Dental visits do not drive turnout; the rate reflects income, insurance, and healthcare access, which line up with who votes.
Why turnout in 97028 looks the way it does
Renters vote less often than owners. About 37% of households in 97028 rent, about 12 points above the U.S. average of 25%. Strong routine healthcare access lines up with higher turnout, and 97028 sits in the top quarter on routine-care measures. 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.