Garnavillo leans heavily Republican by roughly 36 points: about 32% of voters vote Democratic and 68% Republican.
About 82% of adults in Garnavillo typically vote, above the U.S. average of about 62%. Among adults in Garnavillo, ~26% vote Democratic, ~56% Republican, and ~18% don't vote. The map below shows estimated turnout by block group.
How Garnavillo compares
Among cities within 25 miles, Garnavillo leans more Republican than 15 of 59 neighbors.
Garnavillo runs about 23 points more Republican than Iowa as a whole.
Why Garnavillo 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 Garnavillo, not a ranked or complete list of what matters most.
Areas with a high white share and below-average college attainment vote Republican. In Garnavillo, about 97% of residents are non-Hispanic white, about 25 points above the U.S. average of 72%; about 13% of adults hold a bachelor's degree, about 11 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; Garnavillo, 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 Garnavillo looks the way it does
Turnout in Garnavillo 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
- Littleport, IA R+39
- Bagley, WI R+43
- Wyalusing, WI R+43
- Guttenberg, IA R+35
- Froelich, IA R+38
- Garber, IA R+48
- Elkport, IA R+49
- Elkader, IA R+35
- St. Olaf, IA R+40
Cities with Similar Populations
- Grand View, ID R+71
- Outland, SC R+34
- Neches, TX R+70
- East Leroy, MI R+40
- Canton, KS R+61
- Lakeville, PA R+27
- Farmdale, GA R+23
- Saltillo, NE R+12
- Laura, OH R+67
- Falmouth, MI R+57
All Local Stats
Home Services
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.