Allison leans heavily Republican by roughly 46 points: about 27% of voters vote Democratic and 73% Republican.
About 85% of adults in Allison typically vote, above the U.S. average of about 62%. Among adults in Allison, ~23% vote Democratic, ~62% Republican, and ~15% don't vote. The map below shows estimated turnout by block group.
How Allison compares
Among cities within 25 miles, Allison leans more Republican than 21 of 45 neighbors.
Allison runs about 33 points more Republican than Iowa as a whole.
Why Allison 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 Allison, not a ranked or complete list of what matters most.
Areas with a high white share and below-average college attainment vote Republican. In Allison, about 97% of residents are non-Hispanic white, about 24 points above the U.S. average of 72%; about 17% of adults hold a bachelor's degree, about 7 points below the Iowa average of 24%.
Cancer-screening access and voter turnout
Places with high colon-cancer-screening access tend to turn out at a higher rate; Allison, IA 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 Allison looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Allison 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 68%, about 8 points above the U.S. average of 60%. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Bristow, IA R+53
- Clarksville, IA R+46
- Packard, IA R+49
- Dumont, IA R+51
- Kesley, IA R+56
- Greene, IA R+40
- Shell Rock, IA R+39
- Parkersburg, IA R+38
- Aplington, IA R+46
- Aredale, IA R+56
Cities with Similar Populations
- Ironton, MN R+38
- Thompsons, TX R+11
- Truby, TX R+79
- Golden City, MO R+69
- Mountville, SC R+21
- Orangeville, IL R+43
- Scio, NY R+43
- Fall Creek, OR R+27
- Smyrna, SC R+69
- North Benton, OH R+54
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Sources and methodology
Precinct-level voting records used to fit the model come from Iowa Secretary 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.