Summerhill is a Republican stronghold. About 23% of voters here vote Democratic and 77% Republican.
About 80% of adults in Summerhill typically vote, above the U.S. average of about 62%. Among adults in Summerhill, ~18% vote Democratic, ~62% Republican, and ~20% don't vote. The map below shows estimated turnout by block group.
How Summerhill compares
Among cities within 25 miles, Summerhill leans more Republican than 72 of 155 neighbors.
Summerhill runs about 53 points more Republican than Pennsylvania as a whole.
Politics vary noticeably by neighborhood within Summerhill. The northeast side is the most Republican-leaning (R+60) and the southwest side is the least Republican-leaning (R+43), a spread of about 16 points.
Why Summerhill leans the way it does
This analysis examined 14,881 data points per city to find what predicts political lean and turnout. The items below are a few correlations that stood out for Summerhill, not a ranked or complete list of what matters most.
Car-dependent areas vote Republican. About 85% of residents in Summerhill drive to work alone, about 11 points above the U.S. average of 74%.
Walkability and Democratic lean
Places with a highly walkable street grid tend to lean Democratic; Summerhill, PA sits above the national average on this measure. A walkable street grid does not change how people vote; it mostly reflects how urban a place is.
Why turnout in Summerhill looks the way it does
Turnout in Summerhill sits close to the national pattern. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Wilmore, PA R+61
- Ehrenfeld, PA R+43
- South Fork, PA R+49
- Portage, PA R+45
- Sidman, PA R+52
- St. Michael, PA R+48
- Mineral Point, PA R+48
- Cassandra, PA R+60
- Beaverdale, PA R+50
Cities with Similar Populations
- Jasper, MO R+63
- South Carthage, TN R+62
- Rocheport, MO R+15
- Wilton, WI R+39
- Chester, GA R+63
- Isabel, LA R+79
- Marion, MS Even
- Addison, AL R+86
- Cecil, PA R+23
- Beverly, OH R+57
All Local Stats
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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.