Ozaukee County leans slightly Republican by roughly 8 points: about 46% of voters vote Democratic and 54% Republican.
About 95% of adults in Ozaukee County typically vote, above the U.S. average of about 62%. Among adults in Ozaukee County, ~44% vote Democratic, ~51% Republican, and ~5% don't vote. The map below shows estimated turnout by block group.
How Ozaukee County compares
Among counties within 50 miles, Ozaukee County leans more Republican than 2 of 8 neighbors.
Ozaukee County runs about 6 points more Republican than Wisconsin as a whole.
Politics vary noticeably by city within Ozaukee County. The southeast side runs the most Democratic (D+9) and the northwest side runs the most Republican (R+39), a spread of about 49 points.
Why Ozaukee County leans the way it does
This analysis examined 14,881 data points per county to find what predicts political lean and turnout. The items below are a few correlations that stood out for Ozaukee County, not a ranked or complete list of what matters most.
Ozaukee County votes Republican even though it is densely developed (about 61%, far above the Wisconsin average of 24%). State and regional patterns outweigh the Democratic lean that density usually predicts here.
Cancer-screening access and voter turnout
Places with high colon-cancer-screening access tend to turn out at a higher rate; Ozaukee County, WI sits in the top tenth nationally on this measure. Cancer screening does not drive turnout; it reflects income, insurance, and healthcare access.
Why turnout in Ozaukee County looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Ozaukee County 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 73%, about 13 points above the U.S. average of 60%. High high-school completion lines up with higher turnout, and about 98% of adults in Ozaukee County have completed high school, in the top fraction of counties. Learn more about the findings and methodology on the political spectrum map.
Nearby Counties
- Washington County, WI R+28
- Milwaukee County, WI D+41
- Waukesha County, WI R+14
- Sheboygan County, WI R+15
- Dodge County, WI R+30
- Racine County, WI D+7
- Fond du Lac County, WI R+23
- Jefferson County, WI R+21
- Kenosha County, WI Even
- Walworth County, WI R+17
Counties with Similar Populations
- Frederick County, VA R+25
- Mendocino County, CA D+23
- Liberty County, TX R+50
- Northumberland County, PA R+39
- Victoria County, TX R+28
- Wayne County, NY R+23
- Grafton County, NH D+18
- St. Clair County, AL R+65
- Rockingham County, NC R+31
- Nassau County, FL R+47
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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.