15902 leans slightly Republican by roughly 12 points: about 44% of voters vote Democratic and 56% Republican.
About 58% of adults in 15902 typically vote, near the U.S. average of about 62%. Among adults in 15902, ~26% vote Democratic, ~33% Republican, and ~41% don't vote. The map below shows estimated turnout by block group.
How 15902 compares
Among zip codes within 15 miles, 15902 leans more Republican than 1 of 39 neighbors.
15902 runs about 9 points more Republican than Pennsylvania as a whole.
Politics vary noticeably by block within 15902. The northwest side runs the most Democratic (D+21) and the northeast side runs the most Republican (R+34), a spread of about 55 points.
Why 15902 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 15902, not a ranked or complete list of what matters most.
15902 votes Republican even though it is densely developed (about 69%, far above the Pennsylvania average of 33%). State and regional patterns outweigh the Democratic lean that density usually predicts here. Low college attainment predicts Republican voting, and 15902 sits in the bottom quarter (about 16%, below 77% of zip codes).
Park access and Republican lean
Places with low park coverage tend to lean Republican; 15902, PA sits in the bottom quarter nationally on this measure. Park access does not change how people vote; it tends to track denser, higher-income areas.
Why turnout in 15902 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 15902 is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. Renters vote less often than owners, and about 36% of households in 15902 rent, above 83% of zip codes. Low high-school completion lines up with lower turnout, and about 86% of adults in 15902 have completed high school, below 78% 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.