97306 leans slightly Democratic by roughly 14 points: about 57% of voters vote Democratic and 43% Republican.
About 79% of adults in 97306 typically vote, above the U.S. average of about 62%. Among adults in 97306, ~45% vote Democratic, ~34% Republican, and ~21% don't vote. The map below shows estimated turnout by block group.
How 97306 compares
Among zip codes within 15 miles, 97306 leans more Democratic than 14 of 16 neighbors.
Politically, 97306 sits close to the rest of Oregon.
Politics vary noticeably by block within 97306. The east side runs the most Democratic (D+25) and the southwest side runs the most Republican (R+14), a spread of about 39 points.
Why 97306 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 97306, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 77% of residents in 97306 live in densely developed areas, about 41 points above the U.S. average of 36%. High college attainment predicts Democratic voting, and 97306 sits in the top quarter (about 43%, above 84% of zip codes).
Population density and Democratic lean
Places with high population density tend to lean Democratic; 97306, OR sits in the top quarter nationally on this measure.
Why turnout in 97306 looks the way it does
Areas with strong routine healthcare access turn out at higher rates. 97306 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 68%, about 8 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.