19090 leans Democratic by roughly 30 points: about 65% of voters vote Democratic and 35% Republican.
About 83% of adults in 19090 typically vote, above the U.S. average of about 62%. Among adults in 19090, ~54% vote Democratic, ~29% Republican, and ~17% don't vote. The map below shows estimated turnout by block group.
How 19090 compares
Among zip codes within 15 miles, 19090 leans more Democratic than 55 of 106 neighbors.
19090 runs about 31 points more Democratic than Pennsylvania as a whole. Pennsylvania is roughly evenly split, and 19090 sits clearly on the Democratic side.
Politics vary noticeably by block within 19090. The south side is the most Democratic-leaning (D+60) and the southeast side is the least Democratic-leaning (D+15), a spread of about 44 points.
Why 19090 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 19090, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 94% of residents in 19090 live in densely developed areas, about 58 points above the U.S. average of 36%. High college attainment predicts Democratic voting, and 19090 sits in the top quarter (about 43%, above 84% of zip codes). 19090 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; 19090, PA sits in the top tenth nationally on this measure.
Why turnout in 19090 looks the way it does
Areas with strong routine healthcare access turn out at higher rates. 19090 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 70%, about 10 points above the U.S. average of 60%. High high-school completion lines up with higher turnout, and about 96% of adults in 19090 have completed high school, above 85% 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.