15209 is a true toss-up. About 52% of voters here vote Democratic and 48% Republican.
About 86% of adults in 15209 typically vote, above the U.S. average of about 62%. Among adults in 15209, ~45% vote Democratic, ~41% Republican, and ~14% don't vote. The map below shows estimated turnout by block group.
How 15209 compares
Among zip codes within 15 miles, 15209 leans more Democratic than 37 of 97 neighbors.
15209 runs about 5 points more Democratic than Pennsylvania as a whole.
Politics vary noticeably by block within 15209. The south side runs the most Democratic (D+21) and the north side runs the most Republican (R+6), a spread of about 27 points.
Why 15209 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 15209, not a ranked or complete list of what matters most.
Density pulls a place toward Democrats and a high white share pulls it toward Republicans. In 15209 the two roughly cancel.
Preventive-care access and voter turnout
Places with strong routine preventive-care access tend to turn out at a higher rate; 15209, PA sits above the national average 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 15209 looks the way it does
Areas with high high-school completion turn out at higher rates. About 96% of adults in 15209 have completed high school, about 6 points above the U.S. average of 90%. 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.