19066 is a Democratic stronghold. About 79% of voters here vote Democratic and 21% Republican.
About 94% of adults in 19066 typically vote, above the U.S. average of about 62%. Among adults in 19066, ~74% vote Democratic, ~20% Republican, and ~6% don't vote. The map below shows estimated turnout by block group.
How 19066 compares
Among zip codes within 15 miles, 19066 leans more Democratic than 78 of 117 neighbors.
19066 runs about 60 points more Democratic than Pennsylvania as a whole. Pennsylvania is roughly evenly split, and 19066 sits clearly on the Democratic side.
Politics vary noticeably by block within 19066. The northeast side is the most Democratic-leaning (D+66) and the southeast side is the least Democratic-leaning (D+43), a spread of about 24 points.
Why 19066 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 19066, not a ranked or complete list of what matters most.
Areas with high college attainment vote Democratic. About 85% of adults in 19066 hold a bachelor's degree, about 57 points above the U.S. average of 28%. Dense areas vote Democratic, and 19066 sits in the top fifth on density (more than 99%, above 96% of zip codes). 19066 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; 19066, 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 19066 looks the way it does
Areas with strong routine healthcare access turn out at higher rates. 19066 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 78%, about 18 points above the U.S. average of 60%. Homeowners vote more often than renters, and about 89% of households in 19066 own their home, compared to around 61% in nearby zip codes. High high-school completion lines up with higher turnout, and about 97% of adults in 19066 have completed high school, above 90% 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.