Marion leans Republican by roughly 24 points: about 38% of voters vote Democratic and 62% Republican.
About 58% of adults in Marion typically vote, near the U.S. average of about 62%. Among adults in Marion, ~22% vote Democratic, ~36% Republican, and ~42% don't vote. The map below shows estimated turnout by block group.
How Marion compares
Among cities within 25 miles, Marion is the least Republican-leaning.
Marion runs about 5 points more Republican than Indiana as a whole.
Politics vary noticeably by neighborhood within Marion. The southwest side is the most Republican-leaning (R+43) and the south side is the least Republican-leaning (R+7), a spread of about 37 points.
Why Marion 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 Marion, not a ranked or complete list of what matters most.
Marion votes Republican even though it is densely developed (about 70%, far above the Indiana average of 25%). State and regional patterns outweigh the Democratic lean that density usually predicts here.
High-school completion, developed land, and voter turnout
Places that combine low high-school-completion share and a heavily developed built environment tend to turn out at a lower rate, as Marion, IN does.
Why turnout in Marion looks the way it does
Renters vote less often than owners. About 35% of households in Marion rent, about 10 points above the U.S. average of 25%. High food insecurity lines up with lower turnout, and about 22% of adults in Marion report food insecurity, above 85% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Shady Hills, IN R+42
- Hanfield, IN R+59
- Sweetser, IN R+50
- Gas City, IN R+46
- Jonesboro, IN R+51
- Jalapa, IN R+54
- Radley, IN R+60
- Mier, IN R+58
- Van Buren, IN R+57
- Swayzee, IN R+55
Cities with Similar Populations
- Indian Trail, NC R+15
- Moorpark, CA D+8
- Lauderdale Lakes, FL D+71
- Grass Valley, CA D+5
- Clementon, NJ D+35
- Michigan City, IN D+12
- Mount Laurel, NJ D+22
- Marrero, LA D+20
- Brighton, NY D+50
- Hopkinsville, KY R+13
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Sources and methodology
Precinct-level voting records used to fit the model come from Indiana 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.