Marshall County is a Republican stronghold. About 22% of voters here vote Democratic and 78% Republican.
About 75% of adults in Marshall County typically vote, above the U.S. average of about 62%. Among adults in Marshall County, ~17% vote Democratic, ~58% Republican, and ~25% don't vote. The map below shows estimated turnout by block group.
How Marshall County compares
Among counties within 50 miles, Marshall County leans more Republican than 12 of 21 neighbors.
Marshall County runs about 26 points more Republican than Kentucky as a whole.
Politics vary noticeably by city within Marshall County. The southeast side is the most Republican-leaning (R+62) and the north side is the least Republican-leaning (R+52), a spread of about 11 points.
Why Marshall County leans the way it does
Density, race composition, education, and family structure all sit close to their national averages in Marshall County. The lean here lands roughly where demographic data alone would predict.
Walkability and Republican lean
Places with a low walkability score tend to lean Republican; Marshall County, KY sits in the bottom quarter nationally on this measure. A walkable street grid does not change how people vote; it mostly reflects how urban a place is.
Why turnout in Marshall County looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Marshall 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 60%, about 5 points above the Kentucky average of 54%. Homeowners vote more often than renters, and about 82% of households in Marshall County own their home, above 87% of counties. Learn more about the findings and methodology on the political spectrum map.
Nearby Counties
- Livingston County, KY R+64
- Lyon County, KY R+56
- Calloway County, KY R+36
- McCracken County, KY R+30
- Graves County, KY R+57
- Trigg County, KY R+56
- Massac County, IL R+46
- Caldwell County, KY R+56
- Crittenden County, KY R+68
- Carlisle County, KY R+69
Counties with Similar Populations
- Malheur County, OR R+42
- Polk County, MO R+61
- Montgomery County, KS R+44
- Huron County, MI R+42
- Gilmer County, GA R+59
- Amherst County, VA R+33
- Claiborne County, TN R+70
- Coos County, NH R+24
- Titus County, TX R+40
- Adams County, NE R+42
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Sources and methodology
Precinct-level voting records used to fit the model come from Kentucky State Board of 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.