Delavan Lake leans Republican by roughly 22 points: about 39% of voters vote Democratic and 61% Republican.
About 94% of adults in Delavan Lake typically vote, above the U.S. average of about 62%. Among adults in Delavan Lake, ~37% vote Democratic, ~58% Republican, and ~5% don't vote. The map below shows estimated turnout by block group.
How Delavan Lake compares
Among cities within 25 miles, Delavan Lake leans more Republican than 34 of 89 neighbors.
Delavan Lake runs about 21 points more Republican than Wisconsin as a whole.
Politics vary noticeably by neighborhood within Delavan Lake. The southwest side is the most Republican-leaning (R+34) and the north side is the least Republican-leaning (R+15), a spread of about 19 points.
Why Delavan Lake 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 Delavan Lake, not a ranked or complete list of what matters most.
Delavan Lake votes Republican even though it is densely developed (about 25%, about 12 points below the U.S. average of 36%). State and regional patterns outweigh the Democratic lean that density usually predicts here.
Population density and Democratic lean
Places with high population density tend to lean Democratic; Delavan Lake, WI sits in the top quarter nationally on this measure.
Why turnout in Delavan Lake looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Delavan Lake 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 70%, about 10 points above the U.S. average of 60%. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Delavan, WI R+13
- Inlet, WI R+29
- Williams Bay, WI R+11
- Fontana-on-Geneva Lake, WI R+2
- Walworth, WI R+18
- Darien, WI R+35
- Fontana, WI R+6
- Como, WI R+16
- Fairfield, WI R+36
- Linton, WI R+37
Cities with Similar Populations
- Nauvoo, AL R+86
- Hickman, KY R+41
- Lansing, NC R+54
- Orrtanna, PA R+43
- Girard, IL R+42
- Adrian, MO R+60
- Akron, IN R+55
- Vermontville, MI R+43
- Kenansville, NC R+14
- Jane Lew, WV R+60
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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.