15721 is a Republican stronghold. About 15% of voters here vote Democratic and 85% Republican.
About 56% of adults in 15721 typically vote, below the U.S. average of about 62%. Among adults in 15721, ~8% vote Democratic, ~48% Republican, and ~44% don't vote. The map below shows estimated turnout by block group.
How 15721 compares
Among zip codes within 15 miles, 15721 leans more Republican than 37 of 38 neighbors.
15721 runs about 68 points more Republican than Pennsylvania as a whole.
Why 15721 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 15721, not a ranked or complete list of what matters most.
Areas with a high white share and below-average college attainment vote Republican. In 15721, about 98% of residents are non-Hispanic white, about 26 points above the U.S. average of 72%; about 14% of adults hold a bachelor's degree, about 11 points below the Pennsylvania average of 26%.
Population density and Republican lean
Places with low population density tend to lean Republican; 15721, PA sits below the national average on this measure.
Why turnout in 15721 looks the way it does
Areas with low high-school completion turn out at lower rates. About 81% of adults in 15721 have completed high school, about 9 points below the U.S. average of 90%. 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.