Allegan County leans Republican by roughly 28 points: about 36% of voters vote Democratic and 64% Republican.
About 84% of adults in Allegan County typically vote, above the U.S. average of about 62%. Among adults in Allegan County, ~30% vote Democratic, ~54% Republican, and ~16% don't vote. The map below shows estimated turnout by block group.
How Allegan County compares
Among counties within 50 miles, Allegan County leans more Republican than 6 of 8 neighbors.
Allegan County runs about 27 points more Republican than Michigan as a whole.
Politics vary noticeably by city within Allegan County. The north side is the most Republican-leaning (R+48) and the northwest side is the least Republican-leaning (R+9), a spread of about 39 points.
Why Allegan 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 Allegan County, not a ranked or complete list of what matters most.
Areas with many family households vote Republican. About 73% of households in Allegan County are family households, about 7 points above the U.S. average of 67%.
Cancer-screening access and voter turnout
Places with high colon-cancer-screening access tend to turn out at a higher rate; Allegan County, MI sits in the top quarter nationally on this measure. Cancer screening does not drive turnout; it reflects income, insurance, and healthcare access.
Why turnout in Allegan County looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Allegan 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 69%, about 9 points above the U.S. average of 60%. Homeowners vote more often than renters, and about 87% of households in Allegan County own their home, in the top fraction of counties. Learn more about the findings and methodology on the political spectrum map.
Nearby Counties
- Ottawa County, MI R+16
- Van Buren County, MI R+20
- Barry County, MI R+34
- Kent County, MI D+10
- Kalamazoo County, MI D+17
- Calhoun County, MI R+9
- Ionia County, MI R+30
- Muskegon County, MI Even
- Cass County, MI R+29
- Berrien County, MI Even
Counties with Similar Populations
- La Crosse County, WI D+8
- Tom Green County, TX R+39
- Clark County, IN R+23
- Comanche County, OK R+18
- San Juan County, NM R+26
- Fayette County, GA R+4
- Carroll County, GA R+35
- Gallatin County, MT D+6
- Berkeley County, WV R+33
- Douglas County, KS D+35
Sources and methodology
Precinct-level voting records used to fit the model come from Michigan Department of State, Elections, 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.