After hostilities broke out in Korea, "Montrose" recommissioned 12 September 1950, and arrived Yokosuka, Japan, 8 January 1951, to help repel the invasion by North Korea. She took troops to Inchon early in 1951; and, in April, after a run to Hong Kong, she steamed for the California coast. She returned to Yokosuka 30 July 1952, and joined TF 90, supporting operations off Korea, until returning to San Diego 6 December 1952.