50566 is a Republican stronghold. About 24% of voters here vote Democratic and 76% Republican.
About 87% of adults in 50566 typically vote, above the U.S. average of about 62%. Among adults in 50566, ~21% vote Democratic, ~66% Republican, and ~13% don't vote. The map below shows estimated turnout by block group.
How 50566 compares
Among zip codes within 15 miles, 50566 leans more Republican than 11 of 14 neighbors.
50566 runs about 38 points more Republican than Iowa as a whole.
Why 50566 leans the way it does
This analysis examined 14,881 data points per zip code to find what predicts political lean and turnout. The items below are a few correlations that stood out for 50566, not a ranked or complete list of what matters most.
Rural areas vote Republican. About 6% of residents in 50566 live in densely developed areas, about 10 points below the Iowa average of 16%. A high family-household share predicts Republican voting, and about 76% of households in 50566 are family households, above 83% of zip codes.
Population density and Republican lean
Places with low population density tend to lean Republican; 50566, IA sits in the bottom quarter nationally on this measure.
Why turnout in 50566 looks the way it does
Areas with strong routine healthcare access turn out at higher rates. 50566 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 Zip Codes
Zip Codes with Similar Populations
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.