15219 is a Democratic stronghold. About 84% of voters here vote Democratic and 16% Republican.
About 64% of adults in 15219 typically vote, near the U.S. average of about 62%. Among adults in 15219, ~54% vote Democratic, ~10% Republican, and ~36% don't vote. The map below shows estimated turnout by block group.
How 15219 compares
Among zip codes within 15 miles, 15219 leans more Democratic than 97 of 101 neighbors.
15219 runs about 70 points more Democratic than Pennsylvania as a whole. Pennsylvania is roughly evenly split, and 15219 sits clearly on the Democratic side.
Politics vary noticeably by block within 15219. The north side is the most Democratic-leaning (D+89) and the southwest side is the least Democratic-leaning (D+45), a spread of about 44 points.
Why 15219 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 15219, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 95% of residents in 15219 live in densely developed areas, about 59 points above the U.S. average of 36%. A high never-married share predicts Democratic voting, and about 72% of adults in 15219 have never been married, in the top fraction of zip codes. 15219 runs against the grain of Pennsylvania, a Democratic-leaning outlier in a roughly evenly split state.
Walkability and Democratic lean
Places with a highly walkable street grid tend to lean Democratic; 15219, PA sits in the top tenth 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 15219 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 15219 is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. 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.