Cornwall leans Republican by roughly 16 points: about 42% of voters vote Democratic and 58% Republican.
About 91% of adults in Cornwall typically vote, above the U.S. average of about 62%. Among adults in Cornwall, ~38% vote Democratic, ~53% Republican, and ~9% don't vote. The map below shows estimated turnout by block group.
How Cornwall compares
Among cities within 25 miles, Cornwall leans more Republican than 29 of 152 neighbors.
Cornwall runs about 14 points more Republican than Pennsylvania as a whole.
Politics vary noticeably by neighborhood within Cornwall. The northeast side is the most Republican-leaning (R+26) and the northwest side is the least Republican-leaning (R+11), a spread of about 16 points.
Why Cornwall 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 Cornwall, not a ranked or complete list of what matters most.
Cornwall votes Republican even though it is densely developed (about 29%, about 7 points below the U.S. average of 36%). Here an older population outweighs the Democratic lean that density usually predicts. A high family-household share predicts Republican voting, and about 80% of households in Cornwall are family households, above 89% of cities.
Preventive-care access and voter turnout
Places with strong routine preventive-care access tend to turn out at a higher rate; Cornwall, PA sits in the top tenth 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 Cornwall looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Cornwall 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 72%, about 12 points above the U.S. average of 60%. High high-school completion lines up with higher turnout, and about 98% of adults in Cornwall have completed high school, above 95% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Mount Gretna Heights, PA R+34
- Mount Hope, PA R+50
- Mount Gretna, PA R+35
- Buffalo Springs, PA R+52
- Timber Hills, PA R+30
- Lebanon, PA R+22
- Poplar Grove, PA R+51
- Cleona, PA R+35
- Penryn, PA R+45
- Mount Wilson, PA R+35
Cities with Similar Populations
- Perryville, AZ R+21
- Windsor, VA R+37
- Philadelphia, TN R+73
- Kinder, LA R+60
- Halls, TN R+54
- Dryden, NY D+17
- Spirit Lake, ID R+60
- Fritch, TX R+72
- Quitman, MS R+28
- Lenox, MA D+39
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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.