16239 leans slightly Republican by roughly 8 points: about 46% of voters vote Democratic and 54% Republican.
About 60% of adults in 16239 typically vote, near the U.S. average of about 62%. Among adults in 16239, ~28% vote Democratic, ~33% Republican, and ~39% don't vote. The map below shows estimated turnout by block group.
How 16239 compares
Among zip codes within 15 miles, 16239 is the least Republican-leaning.
16239 runs about 7 points more Republican than Pennsylvania as a whole.
Politics vary noticeably by block within 16239. The southeast side is the most Republican-leaning (R+58) and the west side is the least Republican-leaning (R+42), a spread of about 15 points.
Why 16239 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 16239, not a ranked or complete list of what matters most.
Areas with low college attainment vote Republican. About 10% of adults in 16239 hold a bachelor's degree, about 16 points below the Pennsylvania average of 26%.
Cancer-screening access and voter turnout
Places with low colon-cancer-screening access tend to turn out at a lower rate; 16239, PA sits in the bottom quarter nationally on this measure. Cancer screening does not drive turnout; it reflects income, insurance, and healthcare access.
Why turnout in 16239 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 16239 is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. Low high-school completion lines up with lower turnout, and about 84% of adults in 16239 have completed high school, below 82% 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.