Sylvania leans heavily Republican by roughly 32 points: about 34% of voters vote Democratic and 66% Republican.
About 91% of adults in Sylvania typically vote, above the U.S. average of about 62%. Among adults in Sylvania, ~31% vote Democratic, ~60% Republican, and ~9% don't vote. The map below shows estimated turnout by block group.
How Sylvania compares
Among cities within 25 miles, Sylvania leans more Republican than 77 of 89 neighbors.
Sylvania runs about 32 points more Republican than Wisconsin as a whole.
Politics vary noticeably by neighborhood within Sylvania. The southeast side is the most Republican-leaning (R+40) and the northwest side is the least Republican-leaning (R+5), a spread of about 35 points.
Why Sylvania 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 Sylvania, not a ranked or complete list of what matters most.
Sylvania votes Republican even though it is densely developed (about 21%, about 15 points below the U.S. average of 36%). State and regional patterns outweigh the Democratic lean that density usually predicts here. A high family-household share predicts Republican voting, and about 75% of households in Sylvania are family households, above 75% of cities.
Preventive-care access and voter turnout
Places with strong routine preventive-care access tend to turn out at a higher rate; Sylvania, WI sits in the top 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 Sylvania looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Sylvania 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 72%, about 12 points above the U.S. average of 60%. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Union Grove, WI R+16
- Yorkville, WI R+30
- Sturtevant, WI Even
- Somers, WI R+13
- Kansasville, WI R+29
- Franksville, WI R+26
- Mount Pleasant, WI D+8
- Eagle Lake Manor, WI R+38
- North Cape, WI R+37
- Elmwood Park, WI D+13
Cities with Similar Populations
- Otoe, NE R+52
- Hubbardstown, WV R+69
- Eddy, NY R+21
- Trask, MO R+69
- Bethel, KY R+55
- Terryville, TX R+69
- Stout, IA R+49
- Millersburg, MO R+49
- Brevig Mission, AK D+33
- Fort Yukon, AK D+27
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.