Seneca leans heavily Republican by roughly 48 points: about 26% of voters vote Democratic and 74% Republican.
About 73% of adults in Seneca typically vote, above the U.S. average of about 62%. Among adults in Seneca, ~19% vote Democratic, ~54% Republican, and ~27% don't vote. The map below shows estimated turnout by block group.
How Seneca compares
Among cities within 25 miles, Seneca leans more Republican than 7 of 31 neighbors.
Seneca runs about 25 points more Republican than Mississippi as a whole.
Politics vary noticeably by neighborhood within Seneca. The southeast side is the most Republican-leaning (R+66) and the west side is the least Republican-leaning (R+21), a spread of about 45 points.
Why Seneca leans the way it does
Density, race composition, education, and family structure all sit close to their national averages in Seneca. The lean here lands roughly where demographic data alone would predict.
Preventive-care access and voter turnout
Places with limited routine preventive-care access tend to turn out at a lower rate; Seneca, MS sits in the bottom tenth nationally on this measure. Dental visits do not drive turnout; the rate reflects income, insurance, and healthcare access, which line up with who votes.
Why turnout in Seneca looks the way it does
Turnout in Seneca sits close to the national pattern. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Lumberton, MS R+64
- Talowah, MS R+59
- Rock Hill, MS R+74
- Pistol Ridge, MS R+76
- Carnes, MS R+71
- Purvis, MS R+59
- Fords Creek, MS R+75
- West Poplarville, MS R+72
- Dixie, MS R+65
- Pinebur, MS R+66
Cities with Similar Populations
- West Tisbury, MA D+62
- Lohrville, IA R+56
- Peytons Store, KY R+69
- Henderson, AL R+58
- Stockton, MD R+31
- Royalton, OH R+52
- Scandia, KS R+76
- Midway, MS R+20
- Dakota, MN R+17
- Granger Homesteads, IA R+32
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Sources and methodology
Precinct-level voting records used to fit the model come from Mississippi 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.