USS Coos Bay, a 1,766-ton Barnegat class small seaplane tender, was built at Houghton, Washington, and was commissioned in May 1943. She departed San Diego for the Western Pacific in July 1943 and served there continuously through the end of 1944. Coos Bay was based at Tulagi, Saipan, and several remote locations during this period, and in mid-1944 she transported men and equipment between New Georgia, Espiritu Santo, and Guadalcanal. In December 1944 she returned to San Pedro, California, for an overhaul.

Coos Bay sailed from Pearl Harbor for Ulithi in March 1945 but collided with a merchant ship enroute. She received emergency repairs at Eniwetok and then returned to San Pedro for permanent repairs. She provided station tender services in Honshu, Japan, between September and December 1945 and then proceeded to Orange, Texas, for inactivation. Coos Bay was decommissioned in December 1946.

In January 1949 Coos Bay was loaned to the Coast Guard as the cutter Coos Bay (WAVP-375, later WHEC-375). She served out of Portland, Maine, primarily on weather station duty. She was returned to the Navy in December 1967 and sunk as a target in January 1968.