USS Callisto (AGP-15) was a Portunus-class motor torpedo boat tender built for the United States Navy during World War II.

Callisto was laid down 31 October 1944, at Hingham, Massachusetts, by the Bethlehem-Hingham Shipyard; launched 29 November; and commissioned 22 December 1944 for transit to its fitting out yard.

Callisto was transferred to the Maritime Commission (MARCOM) 14 May 1948, and laid up in the National Defense Reserve Fleet.

Delayed at Pearl Harbor, by the cessation of hostilities, it reported at San Pedro Bay, Philippines, on 15 October, to serve as tender to Motor Torpedo Boat Squadron 9, busy with the varied tasks given these speedy craft as normal life was restored to the Philippines.

Callisto provided berthing, maintenance, and supply facilities for its assigned squadron until 20 December, when it cleared for San Francisco.