Carlisle Albert Herman Trost (April 24, 1930 – September 29, 2020) was a United States Navy officer. He was the 23rd Chief of Naval Operations (CNO) and a member of the Joint Chiefs of Staff from 1 July 1986 to 29 June 1990. He retired from active naval service on 1 July 1990, following completion of a four-year term as CNO.