Summit Corners leans heavily Republican by roughly 32 points: about 34% of voters vote Democratic and 66% Republican.
About more than 99% of adults in Summit Corners typically vote, above the U.S. average of about 62%. Among adults in Summit Corners, ~34% vote Democratic, ~66% Republican, and ~0% don't vote. The map below shows estimated turnout by block group.
How Summit Corners compares
Among cities within 25 miles, Summit Corners leans more Republican than 52 of 90 neighbors.
Summit Corners runs about 32 points more Republican than Wisconsin as a whole.
Why Summit Corners 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 Summit Corners, not a ranked or complete list of what matters most.
Summit Corners votes Republican even though it is densely developed (about 26%, about 10 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 77% of households in Summit Corners are family households, above 83% of cities.
Cancer-screening access and voter turnout
Places with high colon-cancer-screening access tend to turn out at a higher rate; Summit Corners, WI sits in the top tenth nationally on this measure. Cancer screening does not drive turnout; it reflects income, insurance, and healthcare access.
Why turnout in Summit Corners looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Summit Corners 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 76%, about 16 points above the U.S. average of 60%. Homeowners vote more often than renters, and about 93% of households in Summit Corners own their home, about 18 points above the U.S. average of 75%. High high-school completion lines up with higher turnout, and more than 99% of adults in Summit Corners have completed high school, in the top fraction of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Oconomowoc, WI R+22
- Oconomowoc Lake, WI R+26
- Okauchee, WI R+17
- Okauchee Lake, WI R+17
- Nashotah, WI R+19
- Delafield, WI R+17
- Lac La Belle, WI R+25
- Dousman, WI R+31
- Waterville, WI R+32
- Sullivan, WI R+42
Cities with Similar Populations
- Lesterville, SD R+56
- Sasakwa, OK R+64
- Silesia, MT R+64
- River, KY R+73
- Red Bank, AL D+7
- Bon Wier, TX R+72
- Haverhill, KS R+56
- Putnamville, PA R+46
- Dougherty, OK R+61
- Whitney, FL R+7
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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.