97310 leans slightly Democratic by roughly 10 points: about 55% of voters vote Democratic and 45% Republican.
About 19% of adults in 97310 typically vote, below the U.S. average of about 62%. Among adults in 97310, ~11% vote Democratic, ~9% Republican, and ~80% don't vote. The map below shows estimated turnout by block group.
How 97310 compares
Among zip codes within 15 miles, 97310 leans more Democratic than 16 of 19 neighbors.
Politically, 97310 sits close to the rest of Oregon.
Why 97310 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 97310, not a ranked or complete list of what matters most.
Dense areas vote Democratic. More than 99% of residents in 97310 live in densely developed areas, about 63 points above the U.S. average of 36%. A high never-married share predicts Democratic voting, and about 71% of adults in 97310 have never been married, in the top fraction of zip codes.
Preventive-care access and voter turnout
Places with limited routine preventive-care access tend to turn out at a lower rate; 97310, OR sits in the bottom tenth 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 97310 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 97310 is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The dental-visit rate here is about 46%, about 17 points below the Oregon average of 63%. Renters vote less often than owners, and about 89% of households in 97310 rent, compared to around 33% in nearby zip codes. High-crime urban areas turn out at lower rates, and 97310 sits in the top 15% on a violent-crime measure. 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.