USS Coos Bay (AVP-25) was a United States Navy Barnegat-class small seaplane tender in commission from 1943 to 1946 that saw service during the latter half of World War II.

Coos Bay cleared San Diego, California on 22 July 1943 for Pearl Harbor, Hawaii, Espiritu Santo, and Cavutu, where she established a seadrome for Patrol Squadron 71 (VP-71) from 13 October 1943 until 23 November 1943.

The formal Japanese surrender to the Allies took place aboard the battleship USS Missouri (BB-63) in Tokyo Bay the following day.

Barnegat-class ships were very reliable and seaworthy and had good habitability, and the Coast Guard viewed them as ideal for ocean station duty, in which they would perform weather reporting and search and rescue tasks, once they were modified by having a balloon shelter added aft and having oceanographic equipment, an oceanographic winch, and a hydrographic winch installed.

Coos Bay rescued the 10-man crew of a downed U.S. Navy patrol aircraft midway between Bermuda and the Azores on 27 February 1953.

On 26 January 1955, Coos Bay rescued six crewmen of a downed United States Air Force transport aircraft about 1,000 nautical miles (1,900 km) east of Bermuda.

In December 1960, Coos Bay rescued four inexperienced seamen aboard the Lamont Geological Observatory research vessel Grace about 104 nautical miles (193 km) southwest of Bermuda.