50613 is a true toss-up. About 50% of voters here vote Democratic and 50% Republican.
About 86% of adults in 50613 typically vote, above the U.S. average of about 62%. Among adults in 50613, ~43% vote Democratic, ~43% Republican, and ~14% don't vote. The map below shows estimated turnout by block group.
How 50613 compares
Among zip codes within 15 miles, 50613 sits roughly in the middle of the political spectrum, with 12 neighbors leaning further in the place's direction and 4 leaning the other way.
50613 runs about 14 points more Democratic than Iowa as a whole. Iowa leans Republican overall, while 50613 sits closer to the political middle.
Politics vary noticeably by block within 50613. The east side runs the most Democratic (D+10) and the northeast side runs the most Republican (R+26), a spread of about 35 points.
Why 50613 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 50613, not a ranked or complete list of what matters most.
Density pulls a place toward Democrats and a high white share pulls it toward Republicans. In 50613 the two roughly cancel. 50613 runs against the grain of Iowa, a split-leaning pocket in a Republican-leaning state.
Cancer-screening access and voter turnout
Places with high colon-cancer-screening access tend to turn out at a higher rate; 50613, IA sits in the top tenth nationally on this measure. Cancer screening does not drive turnout; it reflects income, insurance, and healthcare access.
Why turnout in 50613 looks the way it does
Areas with strong routine healthcare access turn out at higher rates. 50613 is in the top quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The dental-visit rate here is about 72%, about 12 points above the U.S. average of 60%. High high-school completion lines up with higher turnout, and about 97% of adults in 50613 have completed high school, above 92% 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.