Summerville is a Republican stronghold. About 4% of voters here vote Democratic and 96% Republican.
About 67% of adults in Summerville typically vote, near the U.S. average of about 62%. Among adults in Summerville, ~3% vote Democratic, ~64% Republican, and ~33% don't vote. The map below shows estimated turnout by block group.
How Summerville compares
Among cities within 25 miles, Summerville leans more Republican than 31 of 43 neighbors.
Summerville runs about 70 points more Republican than Louisiana as a whole.
Politics vary noticeably by neighborhood within Summerville. The west side is the most Republican-leaning (R+96) and the south side is the least Republican-leaning (R+84), a spread of about 13 points.
Why Summerville 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 Summerville, not a ranked or complete list of what matters most.
Areas with a high white share and below-average college attainment vote Republican. In Summerville, about 95% of residents are non-Hispanic white, about 23 points above the U.S. average of 72%; about 8% of adults hold a bachelor's degree, about 12 points below the Louisiana average of 19%.
Homeownership and voter turnout
Places with homeowner-heavy households tend to turn out at a higher rate; Summerville, LA sits in the top tenth nationally on this measure.
Why turnout in Summerville looks the way it does
Homeowners vote more often than renters. About 94% of households in Summerville own their home, about 18 points above the Louisiana average of 76%. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Routon, LA R+92
- Aimwell, LA R+95
- Jena, LA R+53
- Searcy, LA R+96
- Rosefield, LA R+94
- Trout, LA R+83
- Olla, LA R+91
- Eden, LA R+93
- Standard, LA R+91
- Manifest, LA R+92
Cities with Similar Populations
- Zeandale, KS R+39
- Wirt, OK R+75
- Parnell, IL R+48
- Eberton, DE D+11
- Leipsic, IN R+62
- Kriete Corners, IN R+58
- Keswick Grove, NJ R+21
- Kettle, KY R+72
- Carmi, AR R+71
- East Hamilton, TX R+70
Sources and methodology
Precinct-level voting records used to fit the model come from Louisiana 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.