51111 leans Republican by roughly 24 points: about 38% of voters vote Democratic and 62% Republican.
About 46% of adults in 51111 typically vote, below the U.S. average of about 62%. Among adults in 51111, ~18% vote Democratic, ~28% Republican, and ~54% don't vote. The map below shows estimated turnout by block group.
How 51111 compares
Among zip codes within 15 miles, 51111 leans more Republican than 8 of 19 neighbors.
51111 runs about 11 points more Republican than Iowa as a whole.
Why 51111 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 51111, not a ranked or complete list of what matters most.
Car-dependent areas vote Republican. About 95% of residents in 51111 drive to work alone, about 21 points above the U.S. average of 74%. Low college attainment predicts Republican voting, and 51111 sits in the bottom quarter (about 16%, below 77% of zip codes). A high family-household share predicts Republican voting, and about 88% of households in 51111 are family households, in the top fraction of zip codes.
Preventive-care access and voter turnout
Places with limited routine preventive-care access tend to turn out at a lower rate; 51111, IA sits in the bottom tenth nationally on this measure. Dental visits do not drive turnout; the rate reflects income, insurance, and healthcare access, which line up with who votes.
Why turnout in 51111 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 51111 is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The dental-visit rate here is about 49%, about 18 points below the Iowa average of 68%. Renters vote less often than owners, and about 82% of households in 51111 rent, compared to around 37% in nearby zip codes. High food insecurity lines up with lower turnout, and about 32% of adults in 51111 report food insecurity, above 95% 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.