That duty continued until late February 1968 when she entered the Long Beach Naval Shipyard for a restricted availability in preparation for her fifth deployment to the Far East. "Turner Joy" stood out of Long Beach on 12 March and—after stops at Oahu, Midway, and Guam—arrived in Subic Bay on 4 April. Over the following five months, the destroyer conducted operations along the coast of Vietnam similar to those performed during previous deployments. She delivered naval gunfire support for American and South Vietnamese troops in South Vietnam and conducted "Sea Dragon" patrols along the coast of North Vietnam to interdict enemy waterborne logistics traffic. Her tours of duty on the gunline took her to the I, II and IV Corps areas of South Vietnam. As during previous deployments, she punctuated assignments in the combat zone with visits to Subic Bay and to Buckner Bay, Okinawa, for fuel, supplies, and repairs, as well as to Kaohsiung, Taiwan; and Hong Kong for rest and relaxation. She completed her last tour of duty of the deployment off the Vietnamese coast on 4 September and, after a brief tender availability at Subic Bay, headed homeward on 8 September. Retracing her outward-bound voyage with stops at Guam, Midway, and Pearl Harbor, "Turner Joy" entered Long Beach on 26 September.