18640 leans slightly Republican by roughly 10 points: about 45% of voters vote Democratic and 55% Republican.
About 72% of adults in 18640 typically vote, above the U.S. average of about 62%. Among adults in 18640, ~32% vote Democratic, ~40% Republican, and ~28% don't vote. The map below shows estimated turnout by block group.
How 18640 compares
Among zip codes within 15 miles, 18640 leans more Republican than 18 of 34 neighbors.
18640 runs about 9 points more Republican than Pennsylvania as a whole.
Politics vary noticeably by block within 18640. The southeast side is the most Republican-leaning (R+26) and the north side is the least Republican-leaning (R+3), a spread of about 23 points.
Why 18640 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 18640, not a ranked or complete list of what matters most.
18640 votes Republican even though it is densely developed (about 77%, far above the Pennsylvania average of 33%). State and regional patterns outweigh the Democratic lean that density usually predicts here.
Walkability and Democratic lean
Places with a highly walkable street grid tend to lean Democratic; 18640, 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 18640 looks the way it does
Turnout in 18640 sits close to the national pattern. Routine healthcare access, homeownership, education, and food security all land near their national averages here. 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.