18503 leans heavily Democratic by roughly 36 points: about 68% of voters vote Democratic and 32% Republican.
About 51% of adults in 18503 typically vote, below the U.S. average of about 62%. Among adults in 18503, ~35% vote Democratic, ~16% Republican, and ~49% don't vote. The map below shows estimated turnout by block group.
How 18503 compares
Among zip codes within 15 miles, 18503 is the most Democratic-leaning.
18503 runs about 37 points more Democratic than Pennsylvania as a whole. Pennsylvania is roughly evenly split, and 18503 sits clearly on the Democratic side.
Politics vary noticeably by block within 18503. The northeast side is the most Democratic-leaning (D+39) and the northwest side is the least Democratic-leaning (D+11), a spread of about 28 points.
Why 18503 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 18503, not a ranked or complete list of what matters most.
Dense areas vote Democratic. More than 99% of residents in 18503 live in densely developed areas, about 64 points above the U.S. average of 36%. A high never-married share predicts Democratic voting, and about 55% of adults in 18503 have never been married, above 97% of zip codes. 18503 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; 18503, PA sits in the top quarter 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 18503 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 18503 is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. Renters vote less often than owners, and about 97% of households in 18503 rent, compared to around 41% in nearby zip codes. High-crime urban areas turn out at lower rates, and 18503 sits in the top 15% on a violent-crime measure. 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.