17866 leans heavily Republican by roughly 36 points: about 32% of voters vote Democratic and 68% Republican.
About 52% of adults in 17866 typically vote, below the U.S. average of about 62%. Among adults in 17866, ~17% vote Democratic, ~35% Republican, and ~48% don't vote. The map below shows estimated turnout by block group.
How 17866 compares
Among zip codes within 15 miles, 17866 leans more Republican than 10 of 36 neighbors.
17866 runs about 34 points more Republican than Pennsylvania as a whole.
Politics vary noticeably by block within 17866. The southeast side is the most Republican-leaning (R+52) and the west side is the least Republican-leaning (R+29), a spread of about 23 points.
Why 17866 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 17866, not a ranked or complete list of what matters most.
Areas with low college attainment vote Republican. About 10% of adults in 17866 hold a bachelor's degree, about 16 points below the Pennsylvania average of 26%.
High-school completion, developed land, and voter turnout
Places that combine low high-school-completion share and a heavily developed built environment tend to turn out at a lower rate, as 17866, PA does.
Why turnout in 17866 looks the way it does
Low high-school completion lines up with lower turnout, and about 87% of adults in 17866 have completed high school, below 76% 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.