South Troy leans heavily Republican by roughly 48 points: about 26% of voters vote Democratic and 74% Republican.
About 90% of adults in South Troy typically vote, above the U.S. average of about 62%. Among adults in South Troy, ~23% vote Democratic, ~67% Republican, and ~10% don't vote. The map below shows estimated turnout by block group.
How South Troy compares
Among cities within 25 miles, South Troy leans more Republican than 24 of 73 neighbors.
South Troy runs about 30 points more Republican than Missouri as a whole.
Politics vary noticeably by neighborhood within South Troy. The southwest side is the most Republican-leaning (R+59) and the northeast side is the least Republican-leaning (R+39), a spread of about 20 points.
Why South Troy 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 South Troy, not a ranked or complete list of what matters most.
Areas with many family households vote Republican. About 81% of households in South Troy are family households, about 15 points above the U.S. average of 67%. Dense places usually vote Democratic, but South Troy runs against that pattern.
Frequent mental distress and voter turnout
Places with a low frequent-mental-distress rate tend to turn out at a higher rate; South Troy, MO sits in the bottom tenth nationally on this measure. Reported mental distress does not drive turnout; it reflects economic and health conditions tied to voting.
Why turnout in South Troy looks the way it does
Turnout in South Troy 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 Cities
- Troy, MO R+45
- Moscow Mills, MO R+48
- Chain of Rocks, MO R+55
- Cave, MO R+64
- Davis, MO R+55
- Wright City, MO R+46
- Hawk Point, MO R+62
- Foristell, MO R+41
- Flint Hill, MO R+19
- Truesdale, MO R+50
Cities with Similar Populations
- Cedarpines Park, CA R+20
- Centertown, MO R+58
- Wanchese, NC R+56
- Bel-Nor, MO D+68
- Fort Loudon, PA R+67
- Cattle Creek, CO D+11
- Dalmatia, PA R+65
- Wyocena, WI R+24
- Shattuck, OK R+76
- Sweetser, IN R+50
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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.