Castle Shannon, Pennsylvania

Castle Shannon, Pennsylvania
Willow Avenue at Castle Shannon Boulevard
Etymology: Local farm named "Castle Shanahan"
Nickname: 
"Shannon"
Location in Allegheny County and the U.S. state of Pennsylvania.
Coordinates: 40°21′57″N 80°1′11″W / 40.36583°N 80.01972°W / 40.36583; -80.01972
CountryUnited States
StatePennsylvania
CountyAllegheny
IncorporatedDecember 20, 1919
Government
  MayorDonald J. Baumgarten (D)
Area
  Total
1.60 sq mi (4.14 km2)
  Land1.60 sq mi (4.14 km2)
  Water0.00 sq mi (0.00 km2)
Elevation
1,040 ft (320 m)
Population
 (2020)
  Total
8,249
  Density5,162.08/sq mi (1,993.39/km2)
Time zoneUTC-5 (EST)
  Summer (DST)UTC-4 (EDT)
ZIP Code
15234
Area code412
FIPS code42-11680
School DistrictKeystone Oaks
Websiteborough.castle-shannon.pa.us

Castle Shannon is a borough in Allegheny County, Pennsylvania, United States. The population was 8,249 at the 2020 census. It is part of the Pittsburgh metropolitan area.