St. Joseph County leans heavily Republican by roughly 34 points: about 33% of voters vote Democratic and 67% Republican.
About 79% of adults in St. Joseph County typically vote, above the U.S. average of about 62%. Among adults in St. Joseph County, ~26% vote Democratic, ~53% Republican, and ~21% don't vote. The map below shows estimated turnout by block group.
How St. Joseph County compares
Among counties within 50 miles, St. Joseph County leans more Republican than 7 of 14 neighbors.
St. Joseph County runs about 33 points more Republican than Michigan as a whole.
Politics vary noticeably by city within St. Joseph County. The east side is the most Republican-leaning (R+47) and the southeast side is the least Republican-leaning (R+26), a spread of about 20 points.
Why St. Joseph 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 St. Joseph County, not a ranked or complete list of what matters most.
Areas with low college attainment vote Republican. About 17% of adults in St. Joseph County hold a bachelor's degree, about 9 points below the Michigan average of 26%.
Walkability and Republican lean
Places with a low walkability score tend to lean Republican; St. Joseph County, MI 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 St. Joseph County looks the way it does
Turnout in St. Joseph 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
- LaGrange County, IN R+63
- Branch County, MI R+38
- Elkhart County, IN R+28
- Kalamazoo County, MI D+17
- Cass County, MI R+29
- Steuben County, IN R+45
- Noble County, IN R+49
- Calhoun County, MI R+9
- Van Buren County, MI R+20
- St. Joseph County, IN D+9
Counties with Similar Populations
- Tipton County, TN R+47
- Granville County, NC R+7
- Cumberland County, TN R+57
- Washington County, NY R+23
- Rutland County, VT R+9
- Pittsylvania County, VA R+39
- Columbia County, NY D+12
- Hood County, TX R+61
- Pender County, NC R+33
- Garfield County, CO R+5
Sources and methodology
Precinct-level voting records used to fit the model come from Michigan Department 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.