On 10 September 1950, "Wantuck" was in the Korean combat zone at the port of Pusan preparing for the amphibious assault at Inchon. She departed Pusan on 13 September 1950 with elements of the 3rd Battalion, 5th Marine Regiment, embarked. Early on the morning of 15 September 1950, "Wantuck" was off Wolmi-do, an island just off Inchon. Her troops stormed ashore on the island and quickly consolidated their position in preparation for the second phase of the operation, the invasion of Inchon itself scheduled for that afternoon. "Wantuck" remained at Inchon supporting the consolidation and expansion of the beachhead until 26 September 1950, at which time she returned to Yokosuka, Japan.