19027 is a Democratic stronghold. About 84% of voters here vote Democratic and 16% Republican.
About 83% of adults in 19027 typically vote, above the U.S. average of about 62%. Among adults in 19027, ~70% vote Democratic, ~13% Republican, and ~17% don't vote. The map below shows estimated turnout by block group.
How 19027 compares
Among zip codes within 15 miles, 19027 leans more Democratic than 86 of 112 neighbors.
19027 runs about 71 points more Democratic than Pennsylvania as a whole. Pennsylvania is roughly evenly split, and 19027 sits clearly on the Democratic side.
Politics vary noticeably by block within 19027. The west side is the most Democratic-leaning (D+81) and the northeast side is the least Democratic-leaning (D+47), a spread of about 34 points.
Why 19027 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 19027, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 97% of residents in 19027 live in densely developed areas, about 60 points above the U.S. average of 36%. High college attainment predicts Democratic voting, and 19027 sits in the top quarter (about 58%, above 93% of zip codes). 19027 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; 19027, PA sits in the top tenth nationally on this measure.
Why turnout in 19027 looks the way it does
Areas with strong routine healthcare access turn out at higher rates. 19027 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 97% of adults in 19027 have completed high school, above 86% 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.