Oregon City leans heavily Republican by roughly 40 points: about 30% of voters vote Democratic and 70% Republican.
About 41% of adults in Oregon City typically vote, below the U.S. average of about 62%. Among adults in Oregon City, ~12% vote Democratic, ~29% Republican, and ~59% don't vote. The map below shows estimated turnout by block group.
How Oregon City compares
Among cities within 25 miles, Oregon City leans more Republican than 37 of 41 neighbors.
Oregon City runs about 61 points more Republican than California as a whole. California leans Democratic overall, while Oregon City is one of the few Republican-leaning pockets.
Why Oregon City 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 Oregon City, not a ranked or complete list of what matters most.
Car-dependent areas vote Republican. About 88% of residents in Oregon City drive to work alone, about 14 points above the U.S. average of 74%. Oregon City runs against the grain of California, a Republican-leaning pocket in a Democratic-leaning state.
Population density, never-married share, and Republican lean
Places that combine low population density and a never-married-heavy adult population tend to lean Republican, as Oregon City, CA does.
Why turnout in Oregon City looks the way it does
Areas with limited routine healthcare access turn out at lower rates. Oregon City is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. Renters vote less often than owners, and about 32% of households in Oregon City rent, above 87% of cities. High food insecurity lines up with lower turnout, and about 26% of adults in Oregon City report food insecurity, above 92% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Honcut, CA R+41
- Oroville, CA R+21
- Pentz, CA R+36
- Oroville East, CA R+29
- Berry Creek, CA R+30
- Yankee Hill, CA R+23
- Thermalito, CA R+25
- South Oroville, CA R+13
- Butte Valley, CA R+25
- Feather Falls, CA R+29
Cities with Similar Populations
- Stonington, MI R+31
- Nenzel, NE R+84
- Fritchton, IN R+61
- Lopeno, TX R+3
- Stanley Corner, SD R+54
- Ridgeville, TN R+69
- Rasselas, PA R+50
- Minor Beach, MI R+23
- Minto, AK D+17
- Pailo, TN R+76
Sources and methodology
Precinct-level voting records used to fit the model come from California Secretary of State, Elections, 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.