Durham leans heavily Democratic by roughly 36 points: about 68% of voters vote Democratic and 32% Republican.
About 69% of adults in Durham typically vote, above the U.S. average of about 62%. Among adults in Durham, ~47% vote Democratic, ~22% Republican, and ~31% don't vote. The map below shows estimated turnout by block group.
How Durham compares
Among cities within 25 miles, Durham leans more Democratic than 91 of 100 neighbors.
Durham runs about 22 points more Democratic than Oregon as a whole.
Why Durham leans the way it does
This analysis examined 14,881 data points per city to find what predicts political lean and turnout. The items below are a few correlations that stood out for Durham, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 96% of residents in Durham live in densely developed areas, about 59 points above the U.S. average of 36%. High college attainment predicts Democratic voting, and Durham sits in the top quarter (about 45%, above 91% of cities).
Population density and Democratic lean
Places with high population density tend to lean Democratic; Durham, OR sits in the top tenth nationally on this measure.
Why turnout in Durham looks the way it does
Turnout in Durham 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 Cities
- Rivergrove, OR D+43
- Tualatin, OR D+32
- King City, OR D+27
- Lake Oswego, OR D+45
- Tigard, OR D+40
- Bull Mountain, OR D+29
- Sherwood, OR D+14
- West Linn, OR D+33
- Wilsonville, OR D+21
- Oak Grove, OR D+37
Cities with Similar Populations
- Keysville, GA R+26
- Reinbeck, IA R+37
- Minong, WI R+28
- Bermuda Run, NC R+22
- Massanutten, VA R+20
- Bellport, NY D+25
- Plaucheville, LA R+81
- Rotonda West, FL R+40
- Bowersville, GA R+70
- Carrollton, MS R+62
All Local Stats
Home Services
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.