97040 leans slightly Republican by roughly 6 points: about 47% of voters vote Democratic and 53% Republican.
About 62% of adults in 97040 typically vote, near the U.S. average of about 62%. Among adults in 97040, ~29% vote Democratic, ~33% Republican, and ~38% don't vote. The map below shows estimated turnout by block group.
How 97040 compares
Among zip codes within 15 miles, 97040 leans more Republican than 5 of 10 neighbors.
97040 runs about 20 points more Republican than Oregon as a whole. Oregon leans Democratic overall, while 97040 is one of the few Republican-leaning pockets.
Why 97040 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 97040, not a ranked or complete list of what matters most.
Rural areas vote Republican. About 6% of residents in 97040 live in densely developed areas, about 25 points below the Oregon average of 31%. 97040 runs against the grain of Oregon, a Republican-leaning pocket in a Democratic-leaning state.
Population density and Republican lean
Places with low population density tend to lean Republican; 97040, OR sits below the national average on this measure.
Why turnout in 97040 looks the way it does
Turnout in 97040 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.