Union Grove leans Republican by roughly 16 points: about 42% of voters vote Democratic and 58% Republican.
About 86% of adults in Union Grove typically vote, above the U.S. average of about 62%. Among adults in Union Grove, ~36% vote Democratic, ~50% Republican, and ~14% don't vote. The map below shows estimated turnout by block group.
How Union Grove compares
Among cities within 25 miles, Union Grove leans more Republican than 50 of 103 neighbors.
Union Grove runs about 15 points more Republican than Wisconsin as a whole.
Politics vary noticeably by neighborhood within Union Grove. The north side is the most Republican-leaning (R+31) and the east side is the least Republican-leaning (R+9), a spread of about 22 points.
Why Union Grove 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 Union Grove, not a ranked or complete list of what matters most.
Union Grove votes Republican even though it is densely developed (about 45%, well above the Wisconsin average of 24%). 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; Union Grove, WI sits in the top quarter nationally on this measure.
Why turnout in Union Grove looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Union Grove 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 69%, about 9 points above the U.S. average of 60%. High high-school completion lines up with higher turnout, and about 96% of adults in Union Grove have completed high school, above 81% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Kansasville, WI R+29
- Yorkville, WI R+30
- Sylvania, WI R+32
- Eagle Lake Manor, WI R+38
- North Cape, WI R+37
- Franksville, WI R+26
- Sturtevant, WI Even
- Paddock Lake, WI R+19
- Wheatland, WI R+35
- Somers, WI R+13
Cities with Similar Populations
- St. Francisville, LA R+36
- Stickney, IL D+16
- Millersville, TN R+46
- Tallulah, LA D+35
- Greenup, KY R+57
- Ranchos de Taos, NM D+34
- Many, LA R+42
- Ulysses, KS R+58
- Erwin, NC R+29
- Marine City, MI R+32
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.