15106 leans slightly Democratic by roughly 6 points: about 53% of voters vote Democratic and 47% Republican.
About 82% of adults in 15106 typically vote, above the U.S. average of about 62%. Among adults in 15106, ~43% vote Democratic, ~39% Republican, and ~18% don't vote. The map below shows estimated turnout by block group.
How 15106 compares
Among zip codes within 15 miles, 15106 leans more Democratic than 46 of 89 neighbors.
15106 runs about 8 points more Democratic than Pennsylvania as a whole.
Politics vary noticeably by block within 15106. The east side runs the most Democratic (D+21) and the northwest side runs the most Republican (R+5), a spread of about 26 points.
Why 15106 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 15106, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 84% of residents in 15106 live in densely developed areas, about 47 points above the U.S. average of 36%. High college attainment predicts Democratic voting, and 15106 sits in the top quarter (about 39%, above 80% of zip codes).
Paved land cover and Democratic lean
Places with extensive paved surfaces tend to lean Democratic; 15106, PA sits in the top quarter nationally on this measure. Paved ground does not change how people vote; it mostly reflects how urban and built-up a place is.
Why turnout in 15106 looks the way it does
Turnout in 15106 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.