52339 leans slightly Republican by roughly 10 points: about 45% of voters vote Democratic and 55% Republican.
About 77% of adults in 52339 typically vote, above the U.S. average of about 62%. Among adults in 52339, ~35% vote Democratic, ~42% Republican, and ~23% don't vote. The map below shows estimated turnout by block group.
How 52339 compares
Among zip codes within 15 miles, 52339 is the least Republican-leaning.
Politically, 52339 sits close to the rest of Iowa.
Politics vary noticeably by block within 52339. The northwest side runs the most Democratic (Even) and the southeast side runs the most Republican (R+46), a spread of about 47 points.
Why 52339 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 52339, not a ranked or complete list of what matters most.
Areas with low college attainment vote Republican. About 14% of adults in 52339 hold a bachelor's degree, about 11 points below the Iowa average of 24%.
Park access and Republican lean
Places with low park coverage tend to lean Republican; 52339, 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 52339 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 52339 is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. 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.