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Castle Shannon

1. Castle Shannon, Pennsylvania, United States [Borough]; population was 9,135 in 1990; housing units was 4,066 in 1990; location is 40°22'N 80°1'W; land area is 1.63 square miles (1,041 acres); FIPS code is 11680 [SourceCBP]
2. Castle Shannon, Pennsylvania, United States [Populated Place] is in Allegheny County; location is 40°21'53"N 80°1'21"W [SourceGSP]