15034 leans slightly Republican by roughly 6 points: about 47% of voters vote Democratic and 53% Republican.
About 65% of adults in 15034 typically vote, near the U.S. average of about 62%. Among adults in 15034, ~30% vote Democratic, ~34% Republican, and ~36% don't vote. The map below shows estimated turnout by block group.
How 15034 compares
Among zip codes within 15 miles, 15034 leans more Republican than 60 of 110 neighbors.
15034 runs about 4 points more Republican than Pennsylvania as a whole.
Why 15034 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 15034, not a ranked or complete list of what matters most.
15034 votes Republican even though it is densely developed (about 80%, far above the Pennsylvania average of 33%). State and regional patterns outweigh the Democratic lean that density usually predicts here. Low college attainment predicts Republican voting, and 15034 sits in the bottom quarter (about 14%, below 83% of zip codes).
Housing overcrowding and voter turnout
Places with low overcrowding tend to turn out at a higher rate; 15034, PA sits in the bottom tenth nationally on this measure.
Why turnout in 15034 looks the way it does
Turnout in 15034 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.