15425 leans heavily Republican by roughly 38 points: about 31% of voters vote Democratic and 69% Republican.
About 72% of adults in 15425 typically vote, above the U.S. average of about 62%. Among adults in 15425, ~22% vote Democratic, ~50% Republican, and ~28% don't vote. The map below shows estimated turnout by block group.
How 15425 compares
Among zip codes within 15 miles, 15425 leans more Republican than 13 of 50 neighbors.
15425 runs about 37 points more Republican than Pennsylvania as a whole.
Politics vary noticeably by block within 15425. The northeast side is the most Republican-leaning (R+49) and the west side is the least Republican-leaning (R+30), a spread of about 19 points.
Why 15425 leans the way it does
Density, race composition, education, and family structure all sit close to their national averages in 15425. The lean here lands roughly where demographic data alone would predict.
Housing overcrowding and voter turnout
Places with low overcrowding tend to turn out at a higher rate; 15425, PA sits in the bottom quarter nationally on this measure.
Why turnout in 15425 looks the way it does
Turnout in 15425 sits close to the national pattern. Routine healthcare access, homeownership, education, and food security all land near their national averages here. 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.