18356 leans slightly Democratic by roughly 10 points: about 55% of voters vote Democratic and 45% Republican.
About 90% of adults in 18356 typically vote, above the U.S. average of about 62%. Among adults in 18356, ~50% vote Democratic, ~40% Republican, and ~10% don't vote. The map below shows estimated turnout by block group.
How 18356 compares
Among zip codes within 15 miles, 18356 leans more Democratic than 21 of 25 neighbors.
18356 runs about 11 points more Democratic than Pennsylvania as a whole.
Why 18356 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 18356, not a ranked or complete list of what matters most.
Areas with high college attainment vote Democratic. About 45% of adults in 18356 hold a bachelor's degree, about 17 points above the U.S. average of 28%. A high never-married share predicts Democratic voting, and about 39% of adults in 18356 have never been married, above 86% of zip codes.
Preventive-care access and voter turnout
Places with strong routine preventive-care access tend to turn out at a higher rate; 18356, PA sits in the top quarter 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 18356 looks the way it does
Areas with strong routine healthcare access turn out at higher rates. 18356 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 70%, about 10 points above the U.S. average of 60%. 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.