Canonsburg leans slightly Republican by roughly 14 points: about 43% of voters vote Democratic and 57% Republican.
About 95% of adults in Canonsburg typically vote, above the U.S. average of about 62%. Among adults in Canonsburg, ~41% vote Democratic, ~54% Republican, and ~5% don't vote. The map below shows estimated turnout by block group.
How Canonsburg compares
Among cities within 25 miles, Canonsburg leans more Republican than 96 of 239 neighbors.
Canonsburg runs about 12 points more Republican than Pennsylvania as a whole.
Politics vary noticeably by neighborhood within Canonsburg. The northwest side is the most Republican-leaning (R+23) and the west side is the least Republican-leaning (R+8), a spread of about 15 points.
Why Canonsburg 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 Canonsburg, not a ranked or complete list of what matters most.
Canonsburg votes Republican even though it is densely developed (about 71%, far above the Pennsylvania average of 33%). State and regional patterns outweigh the Democratic lean that density usually predicts here.
Walkability and Democratic lean
Places with a highly walkable street grid tend to lean Democratic; Canonsburg, PA sits in the top quarter nationally on this measure. A walkable street grid does not change how people vote; it mostly reflects how urban a place is.
Why turnout in Canonsburg looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Canonsburg 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 73%, about 13 points above the U.S. average of 60%. High high-school completion lines up with higher turnout, and about 97% of adults in Canonsburg have completed high school, above 91% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Hendersonville, PA R+11
- Strabane, PA R+12
- Muse, PA R+27
- Lawrence, PA R+12
- Cecil-Bishop, PA R+20
- Houston, PA R+20
- Cecil, PA R+23
- Meadowlands, PA R+22
- Venetia, PA R+19
- Eighty Four, PA R+33
Cities with Similar Populations
- Westfield, MA Even
- Carol Stream, IL D+10
- Beverly Hills, CA D+18
- Buffalo Grove, IL D+25
- DePere, WI R+8
- Plymouth, MI D+5
- Nicholasville, KY R+34
- Thibodaux, LA R+33
- Atwater, CA R+13
- Hallandale Beach, FL D+8
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.