19131 is a Democratic stronghold. About 92% of voters here vote Democratic and 8% Republican.
About 72% of adults in 19131 typically vote, above the U.S. average of about 62%. Among adults in 19131, ~66% vote Democratic, ~6% Republican, and ~28% don't vote. The map below shows estimated turnout by block group.
How 19131 compares
Among zip codes within 15 miles, 19131 leans more Democratic than 105 of 116 neighbors.
19131 runs about 86 points more Democratic than Pennsylvania as a whole. Pennsylvania is roughly evenly split, and 19131 sits clearly on the Democratic side.
Politics vary noticeably by block within 19131. The east side is the most Democratic-leaning (D+90) and the northwest side is the least Democratic-leaning (D+66), a spread of about 24 points.
Why 19131 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 19131, not a ranked or complete list of what matters most.
Dense areas vote Democratic. More than 99% of residents in 19131 live in densely developed areas, about 63 points above the U.S. average of 36%. A high never-married share predicts Democratic voting, and about 59% of adults in 19131 have never been married, above 98% of zip codes. 19131 runs against the grain of Pennsylvania, a Democratic-leaning outlier in a roughly evenly split state.
Population density and Democratic lean
Places with high population density tend to lean Democratic; 19131, PA sits in the top tenth nationally on this measure.
Why turnout in 19131 looks the way it does
Areas with strong routine healthcare access turn out at higher rates. 19131 is in the top quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The dental-visit rate here is about 54%, about 6 points below the U.S. average of 60%. 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.