15420 leans heavily Republican by roughly 40 points: about 30% of voters vote Democratic and 70% Republican.
About 76% of adults in 15420 typically vote, above the U.S. average of about 62%. Among adults in 15420, ~23% vote Democratic, ~53% Republican, and ~24% don't vote. The map below shows estimated turnout by block group.
How 15420 compares
Among zip codes within 15 miles, 15420 leans more Republican than 40 of 77 neighbors.
15420 runs about 38 points more Republican than Pennsylvania as a whole.
Why 15420 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 15420, not a ranked or complete list of what matters most.
Car-dependent areas vote Republican. About 83% of residents in 15420 drive to work alone, about 9 points above the U.S. average of 74%.
Homeownership and voter turnout
Places with homeowner-heavy households tend to turn out at a higher rate; 15420, PA sits in the top quarter nationally on this measure.
Why turnout in 15420 looks the way it does
Turnout in 15420 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 Pennsylvania Department of State, Bureau of 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.