St. John leans heavily Democratic by roughly 32 points: about 66% of voters vote Democratic and 34% Republican.
About 47% of adults in St. John typically vote, below the U.S. average of about 62%. Among adults in St. John, ~31% vote Democratic, ~16% Republican, and ~53% 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 Democratic than 120 of 177 neighbors.
St. John runs about 50 points more Democratic than Missouri as a whole. Missouri leans Republican overall, while St. John is one of the few Democratic-leaning pockets.
Politics vary noticeably by neighborhood within St. John. The southeast side is the most Democratic-leaning (D+55) and the southwest side is the least Democratic-leaning (D+20), a spread of about 34 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.
Dense areas vote Democratic. More than 99% of residents in St. John live in densely developed areas, about 64 points above the U.S. average of 36%. A high never-married share predicts Democratic voting, and about 33% of adults in St. John have never been married, above 84% of cities. St. John runs against the grain of Missouri, a Democratic-leaning pocket in a Republican-leaning state.
Population density and Democratic lean
Places with high population density tend to lean Democratic; St. John, MO sits in the top tenth nationally on this measure.
Why turnout in St. John looks the way it does
Areas with limited routine healthcare access turn out at lower rates. St. John is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The dental-visit rate here is about 48%, about 9 points below the Missouri average of 57%. Renters vote less often than owners, and about 40% of households in St. John rent, about 15 points above the U.S. average of 25%. High food insecurity lines up with lower turnout, and about 27% of adults in St. John report food insecurity, above 93% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Charlack, MO D+49
- Sycamore Hills, MO D+29
- Woodson Terrace, MO D+30
- Breckenridge Hills, MO D+33
- Bel-Ridge, MO D+69
- Edmundson, MO D+27
- Overland, MO D+24
- Bellerive, MO D+56
- Bel-Nor, MO D+68
- Vinita Park, MO D+66
Cities with Similar Populations
- Manorhaven, NY D+5
- Grant, MI R+44
- Montpelier, OH R+53
- Viroqua, WI R+8
- White Oak, TX R+71
- Carrollton, KY R+46
- Midway Park, NC R+10
- Etowah, TN R+60
- Cuba, MO R+59
- Amite, LA R+32
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Sources and methodology
Precinct-level voting records used to fit the model come from Missouri 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.