15870 leans heavily Republican by roughly 50 points: about 25% of voters vote Democratic and 75% Republican.
About 69% of adults in 15870 typically vote, above the U.S. average of about 62%. Among adults in 15870, ~17% vote Democratic, ~52% Republican, and ~31% don't vote. The map below shows estimated turnout by block group.
How 15870 compares
Among zip codes within 15 miles, 15870 leans more Republican than 4 of 8 neighbors.
15870 runs about 48 points more Republican than Pennsylvania as a whole.
Why 15870 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 15870, not a ranked or complete list of what matters most.
Rural areas with a high white share vote Republican. 15870 sits in the bottom quarter on density and about 96% of residents are non-Hispanic white, about 9 points above the Pennsylvania average of 87%.
Paved land cover and Republican lean
Places with little paved surface tend to lean Republican; 15870, PA sits in the bottom tenth nationally on this measure. Paved ground does not change how people vote; it mostly reflects how urban and built-up a place is.
Why turnout in 15870 looks the way it does
Homeowners vote more often than renters. About 93% of households in 15870 own their home, about 14 points above the Pennsylvania average of 79%. High high-school completion lines up with higher turnout, and about 96% of adults in 15870 have completed high school, above 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.