St. John leans Republican by roughly 26 points: about 37% of voters vote Democratic and 63% Republican.
About 85% of adults in St. John typically vote, above the U.S. average of about 62%. Among adults in St. John, ~31% vote Democratic, ~53% Republican, and ~16% don't vote. The map below shows estimated turnout by block group.
How St. John compares
Among cities within 25 miles, St. John leans more Republican than 77 of 108 neighbors.
St. John runs about 8 points more Republican than Indiana as a whole.
Politics vary noticeably by neighborhood within St. John. The south side is the most Republican-leaning (R+33) and the northeast side is the least Republican-leaning (R+23), a spread of about 10 points.
Why St. John 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 St. John, not a ranked or complete list of what matters most.
St. John votes Republican even though it is densely developed (about 69%, far above the Indiana average of 25%). State and regional patterns outweigh the Democratic lean that density usually predicts here. A high family-household share predicts Republican voting, and about 81% of households in St. John are family households, above 91% of cities.
Cancer-screening access and voter turnout
Places with high colon-cancer-screening access tend to turn out at a higher rate; St. John, IN sits in the top tenth nationally on this measure. Cancer screening does not drive turnout; it reflects income, insurance, and healthcare access.
Why turnout in St. John looks the way it does
Areas with strong routine healthcare access turn out at higher rates. St. John 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%. Homeowners vote more often than renters, and about 97% of households in St. John own their home, compared to around 81% in nearby cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Schererville, IN R+5
- Dyer, IN R+16
- Cedar Lake, IN R+37
- Sauk Village, IL D+59
- Griffith, IN D+4
- Merrillville, IN D+47
- Crown Point, IN R+17
- Crete, IL D+19
- Lynwood, IL D+67
- Highland, IN Even
Cities with Similar Populations
- Lanham, MD D+68
- Rockingham, NC R+16
- Arcadia, FL R+31
- Prospect, KY R+7
- Hawthorne, NJ R+8
- Sterling, IL R+5
- Glenvar Heights, FL R+11
- Hoschton, GA R+39
- Mill Valley, CA D+55
- Albert Lea, MN R+11
All Local Stats
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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.