Grant County leans Republican by roughly 24 points: about 38% of voters vote Democratic and 62% Republican.
About 73% of adults in Grant County typically vote, above the U.S. average of about 62%. Among adults in Grant County, ~28% vote Democratic, ~45% Republican, and ~27% don't vote. The map below shows estimated turnout by block group.
How Grant County compares
Among counties within 50 miles, Grant County leans more Republican than 4 of 9 neighbors.
Grant County runs about 22 points more Republican than Wisconsin as a whole.
Politics vary noticeably by city within Grant County. The southwest side is the most Republican-leaning (R+38) and the southeast side is the least Republican-leaning (R+7), a spread of about 31 points.
Why Grant County leans the way it does
Density, race composition, education, and family structure all sit close to their national averages in Grant County. The lean here lands roughly where demographic data alone would predict.
High-school completion and voter turnout
Places with high-school-completion-heavy adults tend to turn out at a higher rate; Grant County, WI sits in the top quarter nationally on this measure.
Why turnout in Grant County looks the way it does
Areas with high high-school completion turn out at higher rates. About 94% of adults in Grant County have completed high school, above 82% of counties. Learn more about the findings and methodology on the political spectrum map.
Nearby Counties
- Dubuque County, IA R+12
- Lafayette County, WI R+31
- Iowa County, WI R+11
- Crawford County, WI R+26
- Jo Daviess County, IL R+18
- Clayton County, IA R+39
- Richland County, WI R+19
- Delaware County, IA R+39
- Jackson County, IA R+35
- Allamakee County, IA R+32
Counties with Similar Populations
- Darke County, OH R+61
- Harrisonburg City, VA D+18
- Waupaca County, WI R+34
- Hoke County, NC D+7
- Oktibbeha County, MS D+3
- Ogle County, IL R+28
- St. Martin Parish, LA R+35
- Rusk County, TX R+53
- Nye County, NV R+41
- Cass County, MI R+29
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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.