Robert "Bob" Lilley (born May 2, 1966) is an American soccer coach who is the head coach of USL Championship club Pittsburgh Riverhounds SC. He has managed the Hershey Wildcats, Montreal Impact, Vancouver Whitecaps, Detroit Ignition, and Rochester Rhinos. A former midfielder, he played collegiately at George Mason before appearing at the professional level for Orlando Lions and Maryland Bays and indoors with Hershey Impact, Harrisburg Heat, and Pittsburgh Stingers.