19031 leans heavily Democratic by roughly 32 points: about 66% of voters vote Democratic and 34% Republican.
About 94% of adults in 19031 typically vote, above the U.S. average of about 62%. Among adults in 19031, ~62% vote Democratic, ~32% Republican, and ~6% don't vote. The map below shows estimated turnout by block group.
How 19031 compares
Among zip codes within 15 miles, 19031 leans more Democratic than 61 of 119 neighbors.
19031 runs about 33 points more Democratic than Pennsylvania as a whole. Pennsylvania is roughly evenly split, and 19031 sits clearly on the Democratic side.
Politics vary noticeably by block within 19031. The southeast side is the most Democratic-leaning (D+41) and the northwest side is the least Democratic-leaning (Even), a spread of about 40 points.
Why 19031 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 19031, not a ranked or complete list of what matters most.
Areas with high college attainment vote Democratic. About 63% of adults in 19031 hold a bachelor's degree, about 34 points above the U.S. average of 28%. Dense areas vote Democratic, and 19031 sits in the top fifth on density (about 83%, above 84% of zip codes). 19031 runs against the grain of Pennsylvania, a Democratic-leaning outlier in a roughly evenly split state.
Preventive-care access and voter turnout
Places with strong routine preventive-care access tend to turn out at a higher rate; 19031, PA sits in the top tenth nationally on this measure. Dental visits do not drive turnout; the rate reflects income, insurance, and healthcare access, which line up with who votes.
Why turnout in 19031 looks the way it does
Areas with strong routine healthcare access turn out at higher rates. 19031 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 76%, about 16 points above the U.S. average of 60%. High high-school completion lines up with higher turnout, and about 96% of adults in 19031 have completed high school, above 84% 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.