15951 leans heavily Republican by roughly 46 points: about 27% of voters vote Democratic and 73% Republican.
About 69% of adults in 15951 typically vote, above the U.S. average of about 62%. Among adults in 15951, ~19% vote Democratic, ~50% Republican, and ~31% don't vote. The map below shows estimated turnout by block group.
How 15951 compares
Among zip codes within 15 miles, 15951 leans more Republican than 11 of 38 neighbors.
15951 runs about 44 points more Republican than Pennsylvania as a whole.
Why 15951 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 15951, not a ranked or complete list of what matters most.
Areas with a high white share and below-average college attainment vote Republican. In 15951, more than 99% of residents are non-Hispanic white, about 27 points above the U.S. average of 72%; about 12% of adults hold a bachelor's degree, about 14 points below the Pennsylvania average of 26%.
High-school completion and voter turnout
Places with high-school-completion-heavy adults tend to turn out at a higher rate; 15951, PA sits in the top quarter nationally on this measure.
Why turnout in 15951 looks the way it does
Areas with strong routine healthcare access turn out at higher rates. 15951 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 66%, about 6 points above the U.S. average of 60%. High high-school completion lines up with higher turnout, and about 97% of adults in 15951 have completed high school, above 86% of zip codes. 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.