Chestnut Hill is a Democratic stronghold. About 85% of voters here vote Democratic and 15% Republican.
About 87% of adults in Chestnut Hill typically vote, above the U.S. average of about 62%. Among adults in Chestnut Hill, ~74% vote Democratic, ~13% Republican, and ~13% don't vote. The map below shows estimated turnout by block group.
How Chestnut Hill compares
Among neighborhoods within 5 miles, Chestnut Hill leans more Democratic than 5 of 11 neighbors.
Chestnut Hill runs about 73 points more Democratic than Pennsylvania as a whole. Pennsylvania is roughly evenly split, and Chestnut Hill sits clearly on the Democratic side.
Politics vary noticeably by block within Chestnut Hill. The east side is the most Democratic-leaning (D+79) and the northwest side is the least Democratic-leaning (D+63), a spread of about 15 points.
Why Chestnut Hill leans the way it does
This analysis examined 14,881 data points per neighborhood to find what predicts political lean and turnout. The items below are a few correlations that stood out for Chestnut Hill, not a ranked or complete list of what matters most.
Areas with high college attainment vote Democratic. About 78% of adults in Chestnut Hill hold a bachelor's degree, about 50 points above the U.S. average of 28%. Chestnut Hill runs against the grain of Pennsylvania, a Democratic-leaning outlier in a roughly evenly split state.
Cancer-screening access and voter turnout
Places with high colon-cancer-screening access tend to turn out at a higher rate; Chestnut Hill, Philadelphia, PA sits in the top tenth nationally on this measure. Cancer screening does not drive turnout; it reflects income, insurance, and healthcare access.
Why turnout in Chestnut Hill looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Chestnut Hill 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 76%, about 16 points above the U.S. average of 60%. High high-school completion lines up with higher turnout, and about 98% of adults in Chestnut Hill have completed high school, above 84% of neighborhoods. Learn more about the findings and methodology on the political spectrum map.
Nearby Neighborhoods
- Wyndmoor, Glenside, PA D+57
- Mount Airy, Philadelphia, PA D+88
- Cedar Brook, Philadelphia, PA D+90
- Roxborough, Philadelphia, PA D+40
- Germantown, Philadelphia, PA D+87
- Manayunk, Philadelphia, PA D+56
- Oak Lane, Philadelphia, PA D+87
- East Falls, Philadelphia, PA D+75
- Logan-Ogontz-Fern Rock, Philadelphia, PA D+85
- Bala Cynwyd, Bala-Cynwyd, PA D+48
Neighborhoods with Similar Populations
- Ravenna, Seattle, WA D+81
- Hollywood Beach-Quadoman, Hollywood, FL R+7
- Whitney Ranch, Henderson, NV D+10
- Clark-Fulton, Cleveland, OH D+30
- Loring Park, Minneapolis, MN D+69
- Everett Mall South, Everett, WA D+13
- Downtown Minneapolis, St. Paul, MN D+64
- Capitol Hill, Salt Lake City, UT D+52
- Concordia, Portland, OR D+79
- Fairmuont, Newark, NJ D+73
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.