Allerton is a Republican stronghold. About 19% of voters here vote Democratic and 81% Republican.
About 67% of adults in Allerton typically vote, near the U.S. average of about 62%. Among adults in Allerton, ~13% vote Democratic, ~54% Republican, and ~33% don't vote. The map below shows estimated turnout by block group.
How Allerton compares
Among cities within 25 miles, Allerton leans more Republican than 32 of 41 neighbors.
Allerton runs about 49 points more Republican than Iowa as a whole.
Why Allerton 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 Allerton, not a ranked or complete list of what matters most.
Areas with a high white share and below-average college attainment vote Republican. In Allerton, about 96% 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%.
Population density and Republican lean
Places with low population density tend to lean Republican; Allerton, IA sits in the bottom quarter nationally on this measure.
Why turnout in Allerton looks the way it does
Turnout in Allerton sits close to the national pattern. Routine healthcare access, homeownership, education, and food security all land near their national averages here. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Corydon, IA R+52
- Clio, IA R+58
- Harvard, IA R+60
- Sewal, IA R+63
- Lineville, IA R+57
- Humeston, IA R+56
- Powersville, MO R+70
- High Point, IA R+60
- Woodland, IA R+60
- Promise City, IA R+58
Cities with Similar Populations
- Turtle River, MN R+18
- Mullan, ID R+46
- Milton Grove, PA R+46
- Harman Junction, VA R+63
- Glade, OH R+62
- Richland, NJ R+25
- St. Clair, VA R+50
- Pulaskiville, OH R+60
- Dixie, WA R+50
- Ammon, VA R+30
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.