18011 leans Republican by roughly 18 points: about 41% of voters vote Democratic and 59% Republican.
About 88% of adults in 18011 typically vote, above the U.S. average of about 62%. Among adults in 18011, ~36% vote Democratic, ~52% Republican, and ~12% don't vote. The map below shows estimated turnout by block group.
How 18011 compares
Among zip codes within 15 miles, 18011 leans more Republican than 27 of 57 neighbors.
18011 runs about 16 points more Republican than Pennsylvania as a whole.
Politics vary noticeably by block within 18011. The west side is the most Republican-leaning (R+41) and the northeast side is the least Republican-leaning (R+7), a spread of about 33 points.
Why 18011 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 18011, not a ranked or complete list of what matters most.
Areas with many family households vote Republican. About 76% of households in 18011 are family households, about 10 points above the U.S. average of 67%.
High-school completion and voter turnout
Places with high-school-completion-heavy adults tend to turn out at a higher rate; 18011, PA sits in the top quarter nationally on this measure.
Why turnout in 18011 looks the way it does
Areas with strong routine healthcare access turn out at higher rates. 18011 is in the top quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The dental-visit rate here is about 69%, about 9 points above the U.S. average of 60%. 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.