Mill City leans heavily Republican by roughly 32 points: about 34% of voters vote Democratic and 66% Republican.
About 97% of adults in Mill City typically vote, above the U.S. average of about 62%. Among adults in Mill City, ~33% vote Democratic, ~64% Republican, and ~3% don't vote. The map below shows estimated turnout by block group.
How Mill City compares
Among cities within 25 miles, Mill City leans more Republican than 7 of 27 neighbors.
Mill City runs about 46 points more Republican than Oregon as a whole. Oregon leans Democratic overall, while Mill City is one of the few Republican-leaning pockets.
Why Mill 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 Mill City, not a ranked or complete list of what matters most.
Mill City votes against the grain of Oregon. Oregon leans Democratic overall, while Mill City runs about 46 points more Republican. Dense places usually vote Democratic, but Mill City runs against that pattern. Low college attainment predicts Republican voting, and Mill City sits in the bottom quarter (about 15%, below 76% of cities).
Population density and Democratic lean
Places with high population density tend to lean Democratic; Mill City, OR sits in the top quarter nationally on this measure.
Why turnout in Mill City looks the way it does
Turnout in Mill City 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
- Gates, OR R+38
- Lyons, OR R+31
- Mehama, OR R+36
- Stayton, OR R+13
- Sublimity, OR R+31
- Scio, OR R+43
- Lacomb, OR R+49
- North Santiam, OR R+45
- Shelburn, OR R+40
Cities with Similar Populations
- Wilber, NE R+56
- Magnolia, OH R+53
- Carbondale, KS R+44
- Davisville, WV R+55
- Puryear, TN R+67
- Malaga, WA R+39
- Westphalia, MI R+45
- Mcveytown, PA R+70
- Britt, IA R+37
- Village of Four Seasons, MO R+38
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.