Sparta leans Republican by roughly 22 points: about 39% of voters vote Democratic and 61% Republican.
About 82% of adults in Sparta typically vote, above the U.S. average of about 62%. Among adults in Sparta, ~32% vote Democratic, ~50% Republican, and ~18% don't vote. The map below shows estimated turnout by block group.
How Sparta compares
Among cities within 25 miles, Sparta leans more Republican than 17 of 44 neighbors.
Sparta runs about 22 points more Republican than Wisconsin as a whole.
Politics vary noticeably by neighborhood within Sparta. The northwest side is the most Republican-leaning (R+41) and the south side is the least Republican-leaning (R+19), a spread of about 22 points.
Why Sparta 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 Sparta, not a ranked or complete list of what matters most.
Sparta 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.
Walkability and Democratic lean
Places with a highly walkable street grid tend to lean Democratic; Sparta, WI sits in the top quarter nationally on this measure. A walkable street grid does not change how people vote; it mostly reflects how urban a place is.
Why turnout in Sparta looks the way it does
Turnout in Sparta sits close to the national pattern. Routine healthcare access, homeownership, education, and food security all land near their national averages here. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Leon, WI R+37
- Rockland, WI R+29
- Melvina, WI R+38
- Bangor, WI R+15
- Cataract, WI R+41
- Oil City, WI R+39
- Middle Ridge, WI R+24
- Norwalk, WI R+38
- Mindoro, WI R+27
- Tunnel City, WI R+28
Cities with Similar Populations
- Cambridge, MD D+18
- Cloverly, MD D+48
- Veradale, WA R+18
- Southchase, FL D+9
- Laurel, VA D+30
- Newberry, FL R+16
- Dewitt, MI Even
- Plymouth Meeting, PA D+19
- Fishkill, NY D+4
- Hibbing, MN R+2
All Local Stats
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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.