50258 leans heavily Republican by roughly 48 points: about 26% of voters vote Democratic and 74% Republican.
About 68% of adults in 50258 typically vote, above the U.S. average of about 62%. Among adults in 50258, ~18% vote Democratic, ~50% Republican, and ~32% don't vote. The map below shows estimated turnout by block group.
How 50258 compares
Among zip codes within 15 miles, 50258 leans more Republican than 11 of 12 neighbors.
50258 runs about 34 points more Republican than Iowa as a whole.
Why 50258 leans the way it does
Density, race composition, education, and family structure all sit close to their national averages in 50258. The lean here lands roughly where demographic data alone would predict.
Population density and Republican lean
Places with low population density tend to lean Republican; 50258, IA sits in the bottom quarter nationally on this measure.
Why turnout in 50258 looks the way it does
Homeowners vote more often than renters. About 89% of households in 50258 own their home, about 8 points above the Iowa average of 81%. High high-school completion lines up with higher turnout, and about 97% of adults in 50258 have completed high school, above 88% of zip codes. 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.