Brown Deer, WI Political Map | Democrat & Republican Areas in Brown Deer

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

Brown Deer leans heavily Democratic by roughly 44 points: about 72% of voters vote Democratic and 28% Republican.

 

About 83% of adults in Brown Deer typically vote, above the U.S. average of about 62%. Among adults in Brown Deer, ~60% vote Democratic, ~23% Republican, and ~17% don't vote. The map below shows estimated turnout by block group.

How Brown Deer compares

Among cities within 25 miles, Brown Deer leans more Democratic than 72 of 74 neighbors.

Brown Deer runs about 46 points more Democratic than Wisconsin as a whole. Wisconsin is roughly evenly split, and Brown Deer sits clearly on the Democratic side.

Politics vary noticeably by neighborhood within Brown Deer. The northeast side is the most Democratic-leaning (D+58) and the southwest side is the least Democratic-leaning (D+30), a spread of about 28 points.

Why Brown Deer 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 Brown Deer, not a ranked or complete list of what matters most.

Dense areas vote Democratic. About 97% of residents in Brown Deer live in densely developed areas, about 61 points above the U.S. average of 36%. High college attainment predicts Democratic voting, and Brown Deer sits in the top quarter (about 41%, above 88% of cities). Brown Deer runs against the grain of Wisconsin, a Democratic-leaning outlier in a roughly evenly split state.

Walkability and Democratic lean

Places with a highly walkable street grid tend to lean Democratic; Brown Deer, WI sits in the top tenth 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 Brown Deer looks the way it does

Areas with strong routine healthcare access turn out at higher rates. Brown Deer 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 69%, about 9 points above the U.S. average of 60%. Learn more about the findings and methodology on the political spectrum map.

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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.