Avoca leans heavily Republican by roughly 40 points: about 30% of voters vote Democratic and 70% Republican.
About 70% of adults in Avoca typically vote, above the U.S. average of about 62%. Among adults in Avoca, ~21% vote Democratic, ~49% Republican, and ~30% don't vote. The map below shows estimated turnout by block group.
How Avoca compares
Among cities within 25 miles, Avoca leans more Republican than 3 of 37 neighbors.
Avoca runs about 27 points more Republican than Iowa as a whole.
Why Avoca 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 Avoca, not a ranked or complete list of what matters most.
Car-dependent areas vote Republican. About 86% of residents in Avoca drive to work alone, about 12 points above the U.S. average of 74%.
Cancer-screening access and voter turnout
Places with high colon-cancer-screening access tend to turn out at a higher rate; Avoca, IA sits above the national average on this measure. Cancer screening does not drive turnout; it reflects income, insurance, and healthcare access.
Why turnout in Avoca looks the way it does
Turnout in Avoca sits close to the national pattern. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Walnut, IA R+43
- Hancock, IA R+47
- Shelby, IA R+54
- Tennant, IA R+54
- Minden, IA R+48
- Harlan, IA R+42
- Oakland, IA R+31
- Marne, IA R+47
- Jacksonville, IA R+50
- Neola, IA R+44
Cities with Similar Populations
- St. Clair Springs, AL R+45
- Columbus AFB, MS R+29
- Mount Zion, GA R+65
- Medon, TN R+47
- Mount Savage, MD R+56
- Dorchester, WI R+51
- Bright Star, TX R+78
- Valley Falls, NY R+33
- Moroni, UT R+66
- Bethesda, OH R+54
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.