Miller County is a Republican stronghold. About 18% of voters here vote Democratic and 82% Republican.
About 77% of adults in Miller County typically vote, above the U.S. average of about 62%. Among adults in Miller County, ~14% vote Democratic, ~63% Republican, and ~23% don't vote. The map below shows estimated turnout by block group.
How Miller County compares
Among counties within 50 miles, Miller County leans more Republican than 10 of 12 neighbors.
Miller County runs about 46 points more Republican than Missouri as a whole.
Politics vary noticeably by city within Miller County. The east side is the most Republican-leaning (R+75) and the southwest side is the least Republican-leaning (R+52), a spread of about 23 points.
Why Miller County leans the way it does
This analysis examined 14,881 data points per county to find what predicts political lean and turnout. The items below are a few correlations that stood out for Miller County, not a ranked or complete list of what matters most.
Areas with a high white share and below-average college attainment vote Republican. In Miller County, about 94% of residents are non-Hispanic white, about 21 points above the U.S. average of 72%; about 19% of adults hold a bachelor's degree, about 10 points below the U.S. average of 28%.
Paved land cover and Republican lean
Places with little paved surface tend to lean Republican; Miller County, MO sits below the national average on this measure. Paved ground does not change how people vote; it mostly reflects how urban and built-up a place is.
Why turnout in Miller County looks the way it does
Turnout in Miller County 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 Counties
- Camden County, MO R+54
- Morgan County, MO R+63
- Cole County, MO R+29
- Moniteau County, MO R+60
- Pulaski County, MO R+36
- Maries County, MO R+66
- Osage County, MO R+70
- Laclede County, MO R+61
- Benton County, MO R+60
- Phelps County, MO R+33
Counties with Similar Populations
- Goochland County, VA R+21
- Randolph County, MO R+49
- Cleburne County, AR R+63
- Teller County, CO R+23
- Crook County, OR R+44
- Milam County, TX R+51
- White County, IN R+43
- Yates County, NY R+28
- Rowan County, KY R+34
- Jackson County, OK R+48
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Sources and methodology
Precinct-level voting records used to fit the model come from Missouri 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.