50142 leans Republican by roughly 30 points: about 35% of voters vote Democratic and 65% Republican.
About more than 99% of adults in 50142 typically vote, above the U.S. average of about 62%. Among adults in 50142, ~36% vote Democratic, ~67% Republican, and ~-3% don't vote. The map below shows estimated turnout by block group.
How 50142 compares
Among zip codes within 15 miles, 50142 leans more Republican than 4 of 11 neighbors.
50142 runs about 17 points more Republican than Iowa as a whole.
Why 50142 leans the way it does
Density, race composition, education, and family structure all sit close to their national averages in 50142. The lean here lands roughly where demographic data alone would predict.
Park access and Republican lean
Places with low park coverage tend to lean Republican; 50142, IA sits in the bottom tenth nationally on this measure. Park access does not change how people vote; it tends to track denser, higher-income areas.
Why turnout in 50142 looks the way it does
Areas with strong routine healthcare access turn out at higher rates. 50142 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 71%, about 11 points above the U.S. average of 60%. Homeowners vote more often than renters, and about 93% of households in 50142 own their home, about 18 points above the U.S. average of 75%. High high-school completion lines up with higher turnout, and about 98% of adults in 50142 have completed high school, above 96% 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.