16646 is a Republican stronghold. About 24% of voters here vote Democratic and 76% Republican.
About 78% of adults in 16646 typically vote, above the U.S. average of about 62%. Among adults in 16646, ~19% vote Democratic, ~60% Republican, and ~21% don't vote. The map below shows estimated turnout by block group.
How 16646 compares
Among zip codes within 15 miles, 16646 leans more Republican than 8 of 41 neighbors.
16646 runs about 51 points more Republican than Pennsylvania as a whole.
Politics vary noticeably by block within 16646. The northwest side is the most Republican-leaning (R+62) and the east side is the least Republican-leaning (R+45), a spread of about 17 points.
Why 16646 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 16646, not a ranked or complete list of what matters most.
Areas with a high white share and below-average college attainment vote Republican. In 16646, about 97% of residents are non-Hispanic white, about 25 points above the U.S. average of 72%; about 19% of adults hold a bachelor's degree, about 7 points below the Pennsylvania average of 26%. Car-dependent areas vote Republican, and about 84% of residents in 16646 drive to work alone, above 84% of zip codes.
Preventive-care access and voter turnout
Places with strong routine preventive-care access tend to turn out at a higher rate; 16646, 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 16646 looks the way it does
Homeowners vote more often than renters. About 91% of households in 16646 own their home, about 12 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.