Cottage Grove, WI Political Map | Democrat & Republican Areas in Cottage Grove

By the BestNeighborhood data science team. Last updated May 2026.

Cottage Grove leans Democratic by roughly 22 points: about 61% of voters vote Democratic and 39% Republican.

 

About 94% of adults in Cottage Grove typically vote, above the U.S. average of about 62%. Among adults in Cottage Grove, ~57% vote Democratic, ~37% Republican, and ~6% don't vote. The map below shows estimated turnout by block group.

How Cottage Grove compares

Among cities within 25 miles, Cottage Grove leans more Democratic than 57 of 72 neighbors.

Cottage Grove runs about 23 points more Democratic than Wisconsin as a whole. Wisconsin is roughly evenly split, and Cottage Grove sits clearly on the Democratic side.

Politics vary noticeably by neighborhood within Cottage Grove. The northwest side is the most Democratic-leaning (D+28) and the southwest side is the least Democratic-leaning (D+7), a spread of about 21 points.

Why Cottage 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 Cottage Grove, not a ranked or complete list of what matters most.

Areas with high college attainment vote Democratic. About 52% of adults in Cottage Grove hold a bachelor's degree, about 23 points above the U.S. average of 28%. Dense areas vote Democratic, and Cottage Grove sits in the top fifth on density (about 49%, above 87% of cities). Cottage Grove 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; Cottage Grove, 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 Cottage Grove looks the way it does

Areas with strong routine healthcare access turn out at higher rates. Cottage 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 74%, about 14 points above the U.S. average of 60%. High high-school completion lines up with higher turnout, and about 98% of adults in Cottage Grove have completed high school, above 96% of cities. Learn more about the findings and methodology on the political spectrum map.

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.