50674 leans heavily Republican by roughly 34 points: about 33% of voters vote Democratic and 67% Republican.
About more than 99% of adults in 50674 typically vote, above the U.S. average of about 62%. Among adults in 50674, ~34% vote Democratic, ~68% Republican, and ~-2% don't vote. The map below shows estimated turnout by block group.
How 50674 compares
Among zip codes within 15 miles, 50674 is the least Republican-leaning.
50674 runs about 21 points more Republican than Iowa as a whole.
Politics vary noticeably by block within 50674. The south side is the most Republican-leaning (R+47) and the east side is the least Republican-leaning (R+30), a spread of about 17 points.
Why 50674 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 50674, not a ranked or complete list of what matters most.
Car-dependent areas vote Republican. About 83% of residents in 50674 drive to work alone, about 10 points above the U.S. average of 74%.
Cancer-screening access and voter turnout
Places with high colon-cancer-screening access tend to turn out at a higher rate; 50674, IA sits above the national average on this measure. Cancer screening does not drive turnout; it reflects income, insurance, and healthcare access.
Why turnout in 50674 looks the way it does
Turnout in 50674 sits close to the national pattern. 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.