18330 leans Republican by roughly 18 points: about 41% of voters vote Democratic and 59% Republican.
About 87% of adults in 18330 typically vote, above the U.S. average of about 62%. Among adults in 18330, ~36% vote Democratic, ~51% Republican, and ~13% don't vote. The map below shows estimated turnout by block group.
How 18330 compares
Among zip codes within 15 miles, 18330 leans more Republican than 16 of 29 neighbors.
18330 runs about 16 points more Republican than Pennsylvania as a whole.
Politics vary noticeably by block within 18330. The southwest side is the most Republican-leaning (R+28) and the northwest side is the least Republican-leaning (R+13), a spread of about 15 points.
Why 18330 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 18330, not a ranked or complete list of what matters most.
Areas with many family households vote Republican. About 79% of households in 18330 are family households, about 13 points above the U.S. average of 67%.
Preventive-care access and voter turnout
Places with strong routine preventive-care access tend to turn out at a higher rate; 18330, PA sits above the national average 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 18330 looks the way it does
Homeowners vote more often than renters. About 92% of households in 18330 own their home, about 13 points above the Pennsylvania average of 79%. 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.