97402 leans Democratic by roughly 22 points: about 61% of voters vote Democratic and 39% Republican.
About 66% of adults in 97402 typically vote, near the U.S. average of about 62%. Among adults in 97402, ~40% vote Democratic, ~26% Republican, and ~34% don't vote. The map below shows estimated turnout by block group.
How 97402 compares
Among zip codes within 15 miles, 97402 leans more Democratic than 10 of 14 neighbors.
97402 runs about 8 points more Democratic than Oregon as a whole.
Politics vary noticeably by block within 97402. The southeast side is the most Democratic-leaning (D+65) and the west side is the least Democratic-leaning (Even), a spread of about 64 points.
Why 97402 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 97402, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 87% of residents in 97402 live in densely developed areas, about 51 points above the U.S. average of 36%. A high never-married share predicts Democratic voting, and about 38% of adults in 97402 have never been married, above 84% of zip codes.
Population density and Democratic lean
Places with high population density tend to lean Democratic; 97402, OR sits in the top quarter nationally on this measure.
Why turnout in 97402 looks the way it does
Turnout in 97402 sits close to the national pattern. Routine healthcare access, homeownership, education, and food security all land near their national averages here. 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.