52804 leans slightly Democratic by roughly 8 points: about 54% of voters vote Democratic and 46% Republican.
About 69% of adults in 52804 typically vote, above the U.S. average of about 62%. Among adults in 52804, ~37% vote Democratic, ~32% Republican, and ~31% don't vote. The map below shows estimated turnout by block group.
How 52804 compares
Among zip codes within 15 miles, 52804 leans more Democratic than 21 of 28 neighbors.
52804 runs about 22 points more Democratic than Iowa as a whole. Iowa leans Republican overall, while 52804 is one of the few Democratic-leaning pockets.
Politics vary noticeably by block within 52804. The southeast side runs the most Democratic (D+31) and the southwest side runs the most Republican (R+7), a spread of about 38 points.
Why 52804 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 52804, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 84% of residents in 52804 live in densely developed areas, about 48 points above the U.S. average of 36%. A high never-married share predicts Democratic voting, and about 36% of adults in 52804 have never been married, above 81% of zip codes. 52804 runs against the grain of Iowa, a Democratic-leaning pocket in a Republican-leaning state.
Population density and Democratic lean
Places with high population density tend to lean Democratic; 52804, IA sits in the top quarter nationally on this measure.
Why turnout in 52804 looks the way it does
Turnout in 52804 sits close to the national pattern. Routine healthcare access, homeownership, education, and food security all land near their national averages here. 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.