Old St. Louis is a Republican stronghold. About 20% of voters here vote Democratic and 80% Republican.
About 80% of adults in Old St. Louis typically vote, above the U.S. average of about 62%. Among adults in Old St. Louis, ~16% vote Democratic, ~64% Republican, and ~20% don't vote. The map below shows estimated turnout by block group.
How Old St. Louis compares
Among cities within 25 miles, Old St. Louis leans more Republican than 64 of 89 neighbors.
Old St. Louis runs about 41 points more Republican than Indiana as a whole.
Why Old St. Louis 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 Old St. Louis, not a ranked or complete list of what matters most.
Car-dependent areas vote Republican. About 90% of residents in Old St. Louis drive to work alone, about 16 points above the U.S. average of 74%. A high white share with below-average college attainment predicts Republican voting, and Old St. Louis fits that profile on both counts. A high family-household share predicts Republican voting, and about 77% of households in Old St. Louis are family households, above 83% of cities.
Park access and Republican lean
Places with low park coverage tend to lean Republican; Old St. Louis, IN sits in the bottom quarter nationally on this measure. Park access does not change how people vote; it tends to track denser, higher-income areas.
Why turnout in Old St. Louis looks the way it does
Homeowners vote more often than renters. About 92% of households in Old St. Louis own their home, about 11 points above the Indiana average of 82%. High high-school completion lines up with higher turnout, and about 97% of adults in Old St. Louis have completed high school, above 89% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Hope, IN R+58
- Norristown, IN R+63
- Flat Rock, IN R+62
- Rugby, IN R+60
- Clifford, IN R+58
- Lewis Creek, IN R+64
- Hartsville, IN R+60
- Mount Auburn, IN R+60
- Pleasure Valley, IN R+61
- Waynesburg, IN R+57
Cities with Similar Populations
- Randolph, IL R+34
- Hurdland, MO R+68
- Jerome, OH R+46
- Elm Flat, TX R+54
- Nanticoke, MD R+26
- Hanna, WV R+62
- Claysville, OH R+61
- Pigeon Hill, ME R+28
- East Palermo, NY R+48
- St. James, IN R+65
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.