16503 leans heavily Democratic by roughly 44 points: about 72% of voters vote Democratic and 28% Republican.
About 45% of adults in 16503 typically vote, below the U.S. average of about 62%. Among adults in 16503, ~33% vote Democratic, ~13% Republican, and ~54% don't vote. The map below shows estimated turnout by block group.
How 16503 compares
Among zip codes within 15 miles, 16503 is the most Democratic-leaning.
16503 runs about 47 points more Democratic than Pennsylvania as a whole. Pennsylvania is roughly evenly split, and 16503 sits clearly on the Democratic side.
Politics vary noticeably by block within 16503. The southwest side is the most Democratic-leaning (D+58) and the northeast side is the least Democratic-leaning (D+39), a spread of about 19 points.
Why 16503 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 16503, not a ranked or complete list of what matters most.
Dense areas vote Democratic. More than 99% of residents in 16503 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 57% of adults in 16503 have never been married, above 97% of zip codes. 16503 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; 16503, 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 16503 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 16503 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 43%, about 20 points below the Pennsylvania average of 64%. Renters vote less often than owners, and about 64% of households in 16503 rent, compared to around 40% in nearby zip codes. Low high-school completion lines up with lower turnout, and about 76% of adults in 16503 have completed high school, below 95% 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.