19120 is a Democratic stronghold. About 83% of voters here vote Democratic and 17% Republican.
About 59% of adults in 19120 typically vote, near the U.S. average of about 62%. Among adults in 19120, ~49% vote Democratic, ~10% Republican, and ~41% don't vote. The map below shows estimated turnout by block group.
How 19120 compares
Among zip codes within 15 miles, 19120 leans more Democratic than 77 of 111 neighbors.
19120 runs about 67 points more Democratic than Pennsylvania as a whole. Pennsylvania is roughly evenly split, and 19120 sits clearly on the Democratic side.
Politics vary noticeably by block within 19120. The north side is the most Democratic-leaning (D+74) and the southeast side is the least Democratic-leaning (D+51), a spread of about 23 points.
Why 19120 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 19120, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 98% of residents in 19120 live in densely developed areas, about 61 points above the U.S. average of 36%. A high never-married share predicts Democratic voting, and about 48% of adults in 19120 have never been married, above 94% of zip codes. 19120 runs against the grain of Pennsylvania, a Democratic-leaning outlier in a roughly evenly split state.
Preventive-care access and voter turnout
Places with limited routine preventive-care access tend to turn out at a lower rate; 19120, PA sits in the bottom 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 19120 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 19120 is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The dental-visit rate here is about 44%, about 20 points below the Pennsylvania average of 64%. Low high-school completion lines up with lower turnout, and about 79% of adults in 19120 have completed high school, below 92% 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.