Olin leans heavily Republican by roughly 40 points: about 30% of voters vote Democratic and 70% Republican.
About 62% of adults in Olin typically vote, near the U.S. average of about 62%. Among adults in Olin, ~19% vote Democratic, ~44% Republican, and ~37% don't vote. The map below shows estimated turnout by block group.
How Olin compares
Among cities within 25 miles, Olin leans more Republican than 36 of 59 neighbors.
Olin runs about 26 points more Republican than Iowa as a whole.
Why Olin 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 Olin, not a ranked or complete list of what matters most.
Areas with low college attainment vote Republican. About 15% of adults in Olin hold a bachelor's degree, about 9 points below the Iowa average of 24%.
Population density and Republican lean
Places with low population density tend to lean Republican; Olin, IA sits below the national average on this measure.
Why turnout in Olin looks the way it does
Turnout in Olin 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
- Hale, IA R+41
- Morley, IA R+36
- Stanwood, IA R+39
- Wyoming, IA R+41
- Center Junction, IA R+39
- Oxford Mills, IA R+43
- Mechanicsville, IA R+34
- Clarence, IA R+35
- Oxford Junction, IA R+42
- Anamosa, IA R+21
Cities with Similar Populations
- Moffet, AL R+80
- Sumner, OR R+27
- Ocee, TX R+65
- Livingston, IL R+40
- Wooster, MI R+34
- Greensboro, FL R+20
- Tekoa, WA R+66
- Secretary, MD R+50
- Sedley, VA R+40
- Kinderlou, GA R+25
All Local Stats
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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.