15202 leans heavily Democratic by roughly 30 points: about 65% of voters vote Democratic and 35% Republican.
About 80% of adults in 15202 typically vote, above the U.S. average of about 62%. Among adults in 15202, ~52% vote Democratic, ~28% Republican, and ~20% don't vote. The map below shows estimated turnout by block group.
How 15202 compares
Among zip codes within 15 miles, 15202 leans more Democratic than 63 of 88 neighbors.
15202 runs about 32 points more Democratic than Pennsylvania as a whole. Pennsylvania is roughly evenly split, and 15202 sits clearly on the Democratic side.
Politics vary noticeably by block within 15202. The southeast side is the most Democratic-leaning (D+42) and the north side is the least Democratic-leaning (D+15), a spread of about 27 points.
Why 15202 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 15202, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 89% of residents in 15202 live in densely developed areas, about 53 points above the U.S. average of 36%. High college attainment predicts Democratic voting, and 15202 sits in the top quarter (about 47%, above 87% of zip codes). 15202 runs against the grain of Pennsylvania, a Democratic-leaning outlier in a roughly evenly split state.
Paved land cover and Democratic lean
Places with extensive paved surfaces tend to lean Democratic; 15202, 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 15202 looks the way it does
Areas with high high-school completion turn out at higher rates. About 97% of adults in 15202 have completed high school, about 5 points above the Pennsylvania average of 91%. 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.