After overhaul at Seattle, Washington, "Stockton" completed refresher training at Pearl Harbor on 24 January 1945. Between 10 February and 9 March, she screened escort carriers as they provided air cover for the landings on Iwo Jima. On 21 February, two days after the landings, "Stockton"s group was attacked by four suicide planes, which sank the escort carrier , and damaged . From 18 March to the end of the war, the destroyer escorted replenishment units of the Logistics Support Group as they provided fuel and supplies to the Fleet during the Okinawa campaign and the concurrent air strikes on the Ryukyus and the Japanese home islands. On 31 March — the day before the Okinawa landings — "Stockton" and sank the Japanese submarine , after a 3½-hour action. In early April, "Stockton" directed the salvage of , which had collided with two tankers of "Stockton"s group.