Miami County leans heavily Republican by roughly 38 points: about 31% of voters vote Democratic and 69% Republican.
About 82% of adults in Miami County typically vote, above the U.S. average of about 62%. Among adults in Miami County, ~25% vote Democratic, ~57% Republican, and ~18% don't vote. The map below shows estimated turnout by block group.
How Miami County compares
Among counties within 50 miles, Miami County leans more Republican than 8 of 13 neighbors.
Miami County runs about 23 points more Republican than Kansas as a whole.
Politics vary noticeably by city within Miami County. The west side is the most Republican-leaning (R+49) and the northeast side is the least Republican-leaning (R+38), a spread of about 10 points.
Why Miami 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 Miami County, not a ranked or complete list of what matters most.
Areas with many family households vote Republican. About 73% of households in Miami County are family households, about 6 points above the U.S. average of 67%.
Food insecurity and voter turnout
Places with low food insecurity tend to turn out at a higher rate; Miami County, KS sits in the bottom tenth nationally on this measure. Food insecurity does not directly drive turnout; it reflects economic hardship, which lines up with lower voting.
Why turnout in Miami County looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Miami County is in the top quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The dental-visit rate here is about 68%, about 8 points above the U.S. average of 60%. High high-school completion lines up with higher turnout, and about 95% of adults in Miami County have completed high school, above 90% of counties. Learn more about the findings and methodology on the political spectrum map.
Nearby Counties
- Franklin County, KS R+44
- Johnson County, KS D+9
- Cass County, MO R+32
- Linn County, KS R+61
- Douglas County, KS D+35
- Anderson County, KS R+58
- Bates County, MO R+60
- Jackson County, MO D+24
- Wyandotte County, KS D+26
- Leavenworth County, KS R+20
Counties with Similar Populations
- Whitley County, IN R+51
- Monroe County, MS R+31
- Scotland County, NC D+2
- Preston County, WV R+58
- Lee County, IL R+21
- Emmet County, MI R+10
- Ford County, KS R+26
- Platte County, NE R+48
- Marshall County, TN R+54
- Christian County, IL R+45
Sources and methodology
Precinct-level voting records used to fit the model come from Kansas 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.