USS Harmon, a 1400-ton Buckley class destroyer escort, was built at Quincy, Massachusetts. Commissioned in August 1943, she conducted her shakedown in the western Atlantic and was then assigned to the southwest Pacific area for escort duties with the Third and Seventh Fleets. As war fronts moved northward, Harmon participated in the January 1945 landings at Lingayen Gulf, Leyte. In March, she operated off Iwo Jima.

Beginning in mid-1945, in preparation for further invasion services, Harmon was modified to increase her gun firepower. World War II ended while this work was being done, and, upon completion of the overhaul, the ship was assigned to training duties in the Pacific and the Atlantic. Decommissioned in March 1947, Harmon remained inactive until she was sold for scrapping in January 1967.

USS Harmon was named in honor of Mess Attendant First Class Leonard Roy Harmon, a hero of the Naval Battle of Guadalcanal.