SS Mission San Antonio was a Type T2-SE-A2 tanker built for the United States Maritime Commission during World War II. After the war she was acquired by the United States Navy as USS Mission San Antonio (AO-119). Later the tanker transferred to the Military Sea Transportation Service as USNS Mission San Antonio (T-AO-119). She was a member of the Mission Buenaventura-class oiler and was named for Mission San Antonio de Padua located near Jolon, California.