"Barnwell" made one more troop lift for the Army, a round-trip voyage from Japan to Lingayan and back, in October. Then, after touching at Kure and Hiroshima, "Barnwell" sailed to Guam, entering Apra Harbor on 30 October. Assigned to the "Magic Carpet" fleet on 23 October, "Barnwell" departed Guam with returning servicemen on the last day of October. Bound for San Francisco at first, she received orders diverting her to Seattle while en route, and "Barnwell" made that port on 12 November. For the remainder of 1945, she operated in coastwise service, visiting Seattle, Washington; Portland, Oregon; as well as San Francisco and San Pedro. Released from such tasks on 15 January 1946 by the arrival of , "Barnwell" left California soon thereafter on her way to the east coast to be deactivated.