68421 leans heavily Republican by roughly 44 points: about 28% of voters vote Democratic and 72% Republican.
About 54% of adults in 68421 typically vote, below the U.S. average of about 62%. Among adults in 68421, ~15% vote Democratic, ~39% Republican, and ~46% don't vote. The map below shows estimated turnout by block group.
How 68421 compares
Among zip codes within 15 miles, 68421 leans more Republican than 1 of 8 neighbors.
68421 runs about 24 points more Republican than Nebraska as a whole.
Why 68421 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 68421, not a ranked or complete list of what matters most.
Rural areas vote Republican. About 6% of residents in 68421 live in densely developed areas, about 12 points below the Nebraska average of 17%.
Walkability and Republican lean
Places with a low walkability score tend to lean Republican; 68421, NE sits in the bottom quarter nationally on this measure. A walkable street grid does not change how people vote; it mostly reflects how urban a place is.
Why turnout in 68421 looks the way it does
Areas with low high-school completion turn out at lower rates. About 99% of adults in 68421 have completed high school, about 9 points above the U.S. average of 90%. 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 Nebraska 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.