Marquette County leans heavily Republican by roughly 36 points: about 32% of voters vote Democratic and 68% Republican.
About 78% of adults in Marquette County typically vote, above the U.S. average of about 62%. Among adults in Marquette County, ~25% vote Democratic, ~53% Republican, and ~22% don't vote. The map below shows estimated turnout by block group.
How Marquette County compares
Among counties within 50 miles, Marquette County is the most Republican-leaning.
Marquette County runs about 35 points more Republican than Wisconsin as a whole.
Why Marquette 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 Marquette County, not a ranked or complete list of what matters most.
Areas with a high white share and below-average college attainment vote Republican. In Marquette County, about 92% of residents are non-Hispanic white, about 20 points above the U.S. average of 72%; about 16% of adults hold a bachelor's degree, about 10 points below the Wisconsin average of 26%.
Walkability and Republican lean
Places with a low walkability score tend to lean Republican; Marquette County, WI sits in the bottom 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 Marquette County looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Marquette 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 64%, above 71% of counties. Homeowners vote more often than renters, and about 81% of households in Marquette County own their home, above 84% of counties. Learn more about the findings and methodology on the political spectrum map.
Nearby Counties
- Green Lake County, WI R+34
- Adams County, WI R+26
- Waushara County, WI R+33
- Columbia County, WI R+17
- Sauk County, WI R+20
- Juneau County, WI R+31
- Dodge County, WI R+30
- Fond du Lac County, WI R+23
- Winnebago County, WI R+3
- Portage County, WI R+7
Counties with Similar Populations
- Gooding County, ID R+54
- Clarke County, MS R+26
- Floyd County, IA R+30
- Pawnee County, OK R+59
- Nottoway County, VA R+9
- Pemiscot County, MO R+30
- Jefferson County, IA R+4
- De Witt County, IL R+43
- Henry County, KY R+51
- Aitkin County, MN R+33
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.