The Morris supported the capture of the Aleutian Islands Attu and Kiska in May 1943, and returned to San Francisco for an overhaul. The Morris took part in the Gilbert Islands offensive, and in early 1944 she destroyed a Japanese counterattack force while providing fire support off Kwajalein.
In April 1944, as part of the Seventh Fleet, the Morris operated in support of the landings at Hollandia, eventually taking part in all landings in the western New Guineas. In October 1944, the Morris sailed for Leyte Gulf and the invasion of the Philippines, and by early 1945, was operating off Luzon.
Later that year, the Morris joined the Fifth Fleet and prepared for operations around Okinawa. On 6 April 1945, while operating off Kerama Retto, the Morris's bow was demolished in a Japanese suicide attack. Following emergency repairs, she sailed for the United States, arriving in San Francisco on 22 May 1945. Declared unseaworthy as a result of the damage, the Morris was decommissioned on 9 November 1945, stricken from the Naval Register on 28 November, and sold for scrap on 2 August 1947.