Grantsburg leans heavily Republican by roughly 36 points: about 32% of voters vote Democratic and 68% Republican.
About 82% of adults in Grantsburg typically vote, above the U.S. average of about 62%. Among adults in Grantsburg, ~26% vote Democratic, ~56% Republican, and ~18% don't vote. The map below shows estimated turnout by block group.
How Grantsburg compares
Among cities within 25 miles, Grantsburg leans more Republican than 20 of 37 neighbors.
Grantsburg runs about 35 points more Republican than Wisconsin as a whole.
Politics vary noticeably by neighborhood within Grantsburg. The northwest side is the most Republican-leaning (R+45) and the north side is the least Republican-leaning (R+33), a spread of about 12 points.
Why Grantsburg leans the way it does
Density, race composition, education, and family structure all sit close to their national averages in Grantsburg. The lean here lands roughly where demographic data alone would predict.
Cancer-screening access and voter turnout
Places with high colon-cancer-screening access tend to turn out at a higher rate; Grantsburg, WI sits in the top quarter nationally on this measure. Cancer screening does not drive turnout; it reflects income, insurance, and healthcare access.
Why turnout in Grantsburg looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Grantsburg 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 64%, above 61% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Branstad, WI R+44
- Trade Lake, WI R+40
- Falun, WI R+38
- Trade River, WI R+41
- West Sweden, WI R+36
- Rock Creek, MN R+46
- Cushing, WI R+38
- Wolf Creek, WI R+42
- Frederic, WI R+34
- Pine City, MN R+35
Cities with Similar Populations
- Springville, IN R+57
- Biscoe, NC R+23
- Ruffin, NC R+49
- Underhill, VT D+11
- Osterville, MA D+22
- Columbus, KS R+52
- New Glarus, WI Even
- Henning, TN R+33
- Centreville, AL R+53
- Holloman AFB, NM R+12
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.