15366 leans heavily Republican by roughly 44 points: about 28% of voters vote Democratic and 72% Republican.
About 67% of adults in 15366 typically vote, near the U.S. average of about 62%. Among adults in 15366, ~19% vote Democratic, ~48% Republican, and ~33% don't vote. The map below shows estimated turnout by block group.
How 15366 compares
Among zip codes within 15 miles, 15366 leans more Republican than 74 of 80 neighbors.
15366 runs about 42 points more Republican than Pennsylvania as a whole.
Why 15366 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 15366, not a ranked or complete list of what matters most.
Areas with a high white share and below-average college attainment vote Republican. In 15366, more than 99% of residents are non-Hispanic white, about 27 points above the U.S. average of 72%; about 8% of adults hold a bachelor's degree, about 18 points below the Pennsylvania average of 26%. Car-dependent areas vote Republican, and about 94% of residents in 15366 drive to work alone, in the top fraction of zip codes.
Cancer-screening access and voter turnout
Places with high colon-cancer-screening access tend to turn out at a higher rate; 15366, PA sits above the national average on this measure. Cancer screening does not drive turnout; it reflects income, insurance, and healthcare access.
Why turnout in 15366 looks the way it does
Turnout in 15366 sits close to the national pattern. 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.