15056 leans slightly Democratic by roughly 12 points: about 56% of voters vote Democratic and 44% Republican.
About 86% of adults in 15056 typically vote, above the U.S. average of about 62%. Among adults in 15056, ~48% vote Democratic, ~38% Republican, and ~14% don't vote. The map below shows estimated turnout by block group.
How 15056 compares
Among zip codes within 15 miles, 15056 leans more Democratic than 43 of 56 neighbors.
15056 runs about 13 points more Democratic than Pennsylvania as a whole. Pennsylvania is roughly evenly split, and 15056 sits clearly on the Democratic side.
Why 15056 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 15056, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 75% of residents in 15056 live in densely developed areas, about 39 points above the U.S. average of 36%. High college attainment predicts Democratic voting, and 15056 sits in the top quarter (about 37%, above 78% of zip codes). 15056 runs against the grain of Pennsylvania, a Democratic-leaning outlier in a roughly evenly split state.
Preventive-care access and voter turnout
Places with strong routine preventive-care access tend to turn out at a higher rate; 15056, PA sits in the top quarter nationally on this measure. Dental visits do not drive turnout; the rate reflects income, insurance, and healthcare access, which line up with who votes.
Why turnout in 15056 looks the way it does
Areas with strong routine healthcare access turn out at higher rates. 15056 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 68%, about 8 points above the U.S. average of 60%. High high-school completion lines up with higher turnout, and about 98% of adults in 15056 have completed high school, above 96% 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.