Martinsville leans slightly Democratic by roughly 14 points: about 57% of voters vote Democratic and 43% Republican.
About 84% of adults in Martinsville typically vote, above the U.S. average of about 62%. Among adults in Martinsville, ~48% vote Democratic, ~36% Republican, and ~16% don't vote. The map below shows estimated turnout by block group.
How Martinsville compares
Among cities within 25 miles, Martinsville leans more Democratic than 35 of 57 neighbors.
Martinsville runs about 15 points more Democratic than Wisconsin as a whole. Wisconsin is roughly evenly split, and Martinsville sits clearly on the Democratic side.
Why Martinsville 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 Martinsville, not a ranked or complete list of what matters most.
Areas with high college attainment vote Democratic. About 43% of adults in Martinsville hold a bachelor's degree, about 15 points above the U.S. average of 28%. Martinsville runs against the grain of Wisconsin, a Democratic-leaning outlier in a roughly evenly split state.
Preventive-care access and voter turnout
Places with strong routine preventive-care access tend to turn out at a higher rate; Martinsville, WI sits in the top tenth nationally on this measure. Dental visits do not drive turnout; the rate reflects income, insurance, and healthcare access, which line up with who votes.
Why turnout in Martinsville looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Martinsville 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 75%, about 15 points above the U.S. average of 60%. High high-school completion lines up with higher turnout, and about 99% of adults in Martinsville have completed high school, above 98% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Springfield Corners, WI D+4
- Cross Plains, WI D+25
- Ashton Corners, WI D+29
- Middleton, WI D+53
- Dane, WI R+9
- Pine Bluff, WI D+19
- Roxbury, WI Even
- Waunakee, WI D+27
- Black Earth, WI D+9
- Mazomanie, WI D+5
Cities with Similar Populations
- Alton, KS R+79
- Saddle, AR R+65
- Cutlips, WV R+62
- Maxville, WI R+37
- Sheltons, LA R+48
- Sheppard, AR R+41
- Coffman, MO R+58
- Struble, IA R+60
- Stotesbury, MO R+67
- Lane, SD R+55
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.