52737 leans heavily Republican by roughly 32 points: about 34% of voters vote Democratic and 66% Republican.
About 59% of adults in 52737 typically vote, near the U.S. average of about 62%. Among adults in 52737, ~20% vote Democratic, ~39% Republican, and ~41% don't vote. The map below shows estimated turnout by block group.
How 52737 compares
Among zip codes within 15 miles, 52737 leans more Republican than 1 of 12 neighbors.
52737 runs about 19 points more Republican than Iowa as a whole.
Why 52737 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 52737, not a ranked or complete list of what matters most.
Areas with low college attainment vote Republican. About 16% of adults in 52737 hold a bachelor's degree, about 9 points below the Iowa average of 24%. A high family-household share predicts Republican voting, and about 75% of households in 52737 are family households, above 80% of zip codes.
Population density and Republican lean
Places with low population density tend to lean Republican; 52737, IA sits below the national average on this measure.
Why turnout in 52737 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 52737 is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. 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.