This article incorporates text from the public domain Dictionary of American Naval Fighting Ships.

Assigned to the Atlantic Fleet, Marlboro departed Boston 14 September for shakedown in Chesapeake Bay.

On 15 October Marlboro got underway from Naval Operating Base, Norfolk, Virginia, for duty with the Service Force out of New York City.

On 8 January 1946, she steamed for the Caribbean, arriving 5 days later at Guantanamo, Cuba, where she remained until sailing 15 May with U.S. Marines embarked for the East Coast.

Assigned to the Atlantic Reserve Fleet on 1 June, she was decommissioned in January 1947 and was berthed on the St. Johns River.