"Roper" remained on the West Coast until July 1921. On 23 July, she departed San Francisco, for duty on the Asiatic Station. Arriving at Cavite, Philippine Islands, on 24 August, she remained in the Philippines into December. She then moved into Chinese waters and, into the summer, operated primarily from Hong Kong and Chefoo. On 25 August 1922, she headed back to California. Routed via Nagasaki, Midway, and Pearl Harbor she arrived at San Francisco on 13 October. Two days later she shifted to San Pedro, California, thence proceeded to San Diego, where she was decommissioned on 14 December 1922 and berthed with the Pacific Reserve Fleet.