Seneca leans Republican by roughly 28 points: about 36% of voters vote Democratic and 64% Republican.
About 79% of adults in Seneca typically vote, above the U.S. average of about 62%. Among adults in Seneca, ~28% vote Democratic, ~51% Republican, and ~21% 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 34 of 58 neighbors.
Seneca runs about 28 points more Republican than Wisconsin as a whole.
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 strong routine preventive-care access tend to turn out at a higher rate; Seneca, WI sits in the top quarter 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
Areas with strong routine healthcare access turn out at higher rates. Seneca is in the top quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The dental-visit rate here is about 67%, about 7 points above the U.S. average of 60%. High high-school completion lines up with higher turnout, and about 96% of adults in Seneca have completed high school, above 86% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Petersburg, WI R+36
- Lynxville, WI R+29
- Mount Sterling, WI R+27
- Steuben, WI R+37
- Gays Mills, WI R+28
- Eastman, WI R+36
- Bell Center, WI R+25
- Ferryville, WI R+27
- Rising Sun, WI R+26
Cities with Similar Populations
- Drakes Mills, PA R+42
- Zion Station, KY R+64
- Cross Keys, SC R+23
- Emden, MO R+69
- Creeksville, NC R+25
- Hannover, ND R+67
- Fort Lonesome, FL R+58
- Chelsea, WI R+51
- Octavia, NE R+57
- Dryville, PA R+31
All Local Stats
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Sources and methodology
Precinct-level voting records used to fit the model come from Wisconsin Elections 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.