52040 leans heavily Republican by roughly 36 points: about 32% of voters vote Democratic and 68% Republican.
About 93% of adults in 52040 typically vote, above the U.S. average of about 62%. Among adults in 52040, ~30% vote Democratic, ~63% Republican, and ~7% don't vote. The map below shows estimated turnout by block group.
How 52040 compares
Among zip codes within 15 miles, 52040 is the least Republican-leaning.
52040 runs about 22 points more Republican than Iowa as a whole.
Politics vary noticeably by block within 52040. The northwest side is the most Republican-leaning (R+53) and the north side is the least Republican-leaning (R+26), a spread of about 28 points.
Why 52040 leans the way it does
Density, race composition, education, and family structure all sit close to their national averages in 52040. 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; 52040, IA sits below the national average on this measure. Park access does not change how people vote; it tends to track denser, higher-income areas.
Why turnout in 52040 looks the way it does
Turnout in 52040 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.