15615 leans heavily Republican by roughly 38 points: about 31% of voters vote Democratic and 69% Republican.
About more than 99% of adults in 15615 typically vote, above the U.S. average of about 62%. Among adults in 15615, ~31% vote Democratic, ~70% Republican, and ~-1% don't vote. The map below shows estimated turnout by block group.
How 15615 compares
Among zip codes within 15 miles, 15615 leans more Republican than 73 of 90 neighbors.
15615 runs about 37 points more Republican than Pennsylvania as a whole.
Why 15615 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 15615, not a ranked or complete list of what matters most.
Car-dependent areas vote Republican. About 90% of residents in 15615 drive to work alone, about 17 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; 15615, PA sits in the top tenth nationally on this measure.
Why turnout in 15615 looks the way it does
Areas with strong routine healthcare access turn out at higher rates. 15615 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 63%, above 56% of zip codes. Homeowners vote more often than renters, and about 94% of households in 15615 own their home, about 19 points above the U.S. average of 75%. 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.