Sewickley Heights is a true toss-up. About 50% of voters here vote Democratic and 50% Republican.
About more than 99% of adults in Sewickley Heights typically vote, above the U.S. average of about 62%. Among adults in Sewickley Heights, ~50% vote Democratic, ~51% Republican, and ~-1% don't vote. The map below shows estimated turnout by block group.
How Sewickley Heights compares
Among cities within 25 miles, Sewickley Heights sits roughly in the middle of the political spectrum, with 147 neighbors leaning further in the place's direction and 69 leaning the other way.
Politically, Sewickley Heights sits close to the rest of Pennsylvania.
Why Sewickley Heights 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 Sewickley Heights, not a ranked or complete list of what matters most.
Density pulls a place toward Democrats and a high white share pulls it toward Republicans. In Sewickley Heights the two roughly cancel.
Preventive-care access and voter turnout
Places with strong routine preventive-care access tend to turn out at a higher rate; Sewickley Heights, 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 Sewickley Heights looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Sewickley Heights 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 99% of adults in Sewickley Heights have completed high school, above 97% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Sewickley, PA D+15
- Glen Osborne, PA D+16
- Edgeworth, PA D+23
- Sewickley Hills, PA R+2
- Glenfield, PA R+2
- Bell Acres, PA Even
- Leetsdale, PA D+11
- Coraopolis, PA R+2
- Carnot-Moon, PA D+9
- Crescent, PA R+13
Cities with Similar Populations
- Mercer, NC R+50
- Milan, MN R+31
- Novinger, MO R+66
- Van Raub, TX R+55
- Pendleton, NC R+16
- Aqua Park, OK R+61
- Concord, VT R+34
- Nuberg, GA R+40
- Cuyuna, MN R+27
- Meadow, TX R+72
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.