50228 leans heavily Republican by roughly 34 points: about 33% of voters vote Democratic and 67% Republican.
About 98% of adults in 50228 typically vote, above the U.S. average of about 62%. Among adults in 50228, ~32% vote Democratic, ~66% Republican, and ~2% don't vote. The map below shows estimated turnout by block group.
How 50228 compares
Among zip codes within 15 miles, 50228 leans more Republican than 8 of 16 neighbors.
50228 runs about 21 points more Republican than Iowa as a whole.
Why 50228 leans the way it does
Density, race composition, education, and family structure all sit close to their national averages in 50228. The lean here lands roughly where demographic data alone would predict.
High-school completion, uninsured rate, and voter turnout
Places that combine high-school-completion-heavy adults and a low uninsured rate tend to turn out at a higher rate, as 50228, IA does.
Why turnout in 50228 looks the way it does
Areas with high high-school completion turn out at higher rates. About 98% of adults in 50228 have completed high school, about 8 points above the U.S. average of 90%. 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.