St. Charles leans Democratic by roughly 16 points: about 58% of voters vote Democratic and 42% Republican.
About 69% of adults in St. Charles typically vote, above the U.S. average of about 62%. Among adults in St. Charles, ~40% vote Democratic, ~29% Republican, and ~31% don't vote. The map below shows estimated turnout by block group.
How St. Charles compares
Among cities within 25 miles, St. Charles leans more Democratic than 29 of 45 neighbors.
St. Charles runs about 34 points more Democratic than South Carolina as a whole. South Carolina leans Republican overall, while St. Charles is one of the few Democratic-leaning pockets.
Politics vary noticeably by neighborhood within St. Charles. The northeast side runs the most Democratic (D+57) and the southwest side runs the most Republican (R+35), a spread of about 92 points.
Why St. Charles 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. Charles, not a ranked or complete list of what matters most.
St. Charles votes against the grain of South Carolina. South Carolina leans Republican overall, while St. Charles runs about 34 points more Democratic. A high never-married share predicts Democratic voting, and about 33% of adults in St. Charles have never been married, above 84% of cities.
Walkability and Republican lean
Places with a low walkability score tend to lean Republican; St. Charles, SC sits below the national average on this measure. A walkable street grid does not change how people vote; it mostly reflects how urban a place is.
Why turnout in St. Charles looks the way it does
Areas with limited routine healthcare access turn out at lower rates. St. Charles is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- McCutchens Crossroads, SC D+42
- Scottsville, SC D+11
- Manville, SC D+17
- Elliott, SC D+49
- Mayesville, SC D+19
- Gaillard Crossroads, SC D+21
- Bon Air Terrace, SC Even
- Bishopville, SC D+20
- South Lynchburg, SC D+49
- Spring Hill, SC D+21
Cities with Similar Populations
- Brandamore, PA R+9
- Palisades Park, MI R+5
- Randolph, IA R+49
- Sanders Corner, SC D+17
- Fillmore, IA R+42
- Kelly, TX R+45
- Latty, OH R+61
- San Carlos, TX R+11
- Maplesville, KY R+72
- Elijah, MO R+67
Sources and methodology
Precinct-level voting records used to fit the model come from South Carolina State Election Commission, 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.