Mill Creek leans heavily Republican by roughly 40 points: about 30% of voters vote Democratic and 70% Republican.
About 58% of adults in Mill Creek typically vote, near the U.S. average of about 62%. Among adults in Mill Creek, ~17% vote Democratic, ~41% Republican, and ~42% don't vote. The map below shows estimated turnout by block group.
How Mill Creek compares
Among cities within 25 miles, Mill Creek is the most Republican-leaning.
Mill Creek runs about 60 points more Republican than California as a whole. California leans Democratic overall, while Mill Creek is one of the few Republican-leaning pockets.
Politics vary noticeably by neighborhood within Mill Creek. The southeast side is the most Republican-leaning (R+41) and the northeast side is the least Republican-leaning (R+21), a spread of about 20 points.
Why Mill Creek 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 Creek, not a ranked or complete list of what matters most.
Mill Creek votes against the grain of California. California leans Democratic overall, while Mill Creek runs about 60 points more Republican. Rural areas vote Republican, and Mill Creek sits in the bottom quarter on density (about 3%, below 92% of cities).
Population density and Republican lean
Places with low population density tend to lean Republican; Mill Creek, CA sits in the bottom tenth nationally on this measure.
Why turnout in Mill Creek looks the way it does
Renters vote less often than owners. About 34% of households in Mill Creek rent, about 9 points above the U.S. average of 25%. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Chester, CA R+19
- Mineral, CA R+39
- Drakesbad, CA R+27
- Westwood, CA R+23
- Canyondam, CA R+6
- Paynes Creek, CA R+39
- Belden, CA R+3
- Viola, CA R+35
Cities with Similar Populations
- Oilmont, MT R+61
- Fulton Run, PA R+49
- Whitefield, IL R+45
- Klondyke, AZ R+55
- Lake Osiris Colony, NY R+26
- Coldwater, WV R+69
- Heflin, KY R+67
- Peers, MO R+58
- St. Paul, ND R+60
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.