18634 leans Republican by roughly 18 points: about 41% of voters vote Democratic and 59% Republican.
About 59% of adults in 18634 typically vote, near the U.S. average of about 62%. Among adults in 18634, ~24% vote Democratic, ~35% Republican, and ~41% don't vote. The map below shows estimated turnout by block group.
How 18634 compares
Among zip codes within 15 miles, 18634 leans more Republican than 11 of 30 neighbors.
18634 runs about 16 points more Republican than Pennsylvania as a whole.
Politics vary noticeably by block within 18634. The southwest side is the most Republican-leaning (R+27) and the northeast side is the least Republican-leaning (R+8), a spread of about 18 points.
Why 18634 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 18634, not a ranked or complete list of what matters most.
18634 votes Republican even though it is densely developed (about 68%, far above the Pennsylvania average of 33%). State and regional patterns outweigh the Democratic lean that density usually predicts here.
Preventive-care access and voter turnout
Places with limited routine preventive-care access tend to turn out at a lower rate; 18634, PA sits in the bottom quarter nationally on this measure. Dental visits do not drive turnout; the rate reflects income, insurance, and healthcare access, which line up with who votes.
Why turnout in 18634 looks the way it does
Renters vote less often than owners. About 39% of households in 18634 rent, about 14 points above the U.S. average of 25%. 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.