52556 leans slightly Democratic by roughly 8 points: about 54% of voters vote Democratic and 46% Republican.
About 96% of adults in 52556 typically vote, above the U.S. average of about 62%. Among adults in 52556, ~52% vote Democratic, ~44% Republican, and ~4% don't vote. The map below shows estimated turnout by block group.
How 52556 compares
Among zip codes within 15 miles, 52556 leans more Democratic than 11 of 12 neighbors.
52556 runs about 21 points more Democratic than Iowa as a whole. Iowa leans Republican overall, while 52556 is one of the few Democratic-leaning pockets.
Politics vary noticeably by block within 52556. The north side runs the most Democratic (D+31) and the northwest side runs the most Republican (R+24), a spread of about 54 points.
Why 52556 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 52556, not a ranked or complete list of what matters most.
Areas with high college attainment vote Democratic. About 46% of adults in 52556 hold a bachelor's degree, about 17 points above the U.S. average of 28%. 52556 runs against the grain of Iowa, a Democratic-leaning pocket in a Republican-leaning state.
Preventive-care access and voter turnout
Places with strong routine preventive-care access tend to turn out at a higher rate; 52556, IA sits above the national average 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 52556 looks the way it does
Areas with high high-school completion turn out at higher rates. About 96% of adults in 52556 have completed high school, about 7 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.