15629 leans slightly Republican by roughly 14 points: about 43% of voters vote Democratic and 57% Republican.
About 58% of adults in 15629 typically vote, near the U.S. average of about 62%. Among adults in 15629, ~25% vote Democratic, ~33% Republican, and ~42% don't vote. The map below shows estimated turnout by block group.
How 15629 compares
Among zip codes within 15 miles, 15629 leans more Republican than 9 of 38 neighbors.
15629 runs about 13 points more Republican than Pennsylvania as a whole.
Why 15629 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 15629, not a ranked or complete list of what matters most.
15629 votes Republican even though it is densely developed (about 94%, far above the Pennsylvania average of 33%). State and regional patterns outweigh the Democratic lean that density usually predicts here.
Walkability and Democratic lean
Places with a highly walkable street grid tend to lean Democratic; 15629, PA sits in the top quarter nationally on this measure. A walkable street grid does not change how people vote; it mostly reflects how urban a place is.
Why turnout in 15629 looks the way it does
Low high-school completion lines up with lower turnout, and about 95% of adults in 15629 have completed high school, above 74% 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.