USS Oyster Bay (AGP-6), originally and later AVP-28, was a United States Navy motor torpedo boat tender in commission from 1943 to 1946.

Oyster Bay departed Seattle, Washington, on 7 December 1943, for shakedown at San Diego, California, which lasted for the remainder of 1943.

Japanese planes attacked the convoy on 27 April 1944, but, while one PT boat was hit, Oyster Bay escaped damage.

Later in June 1944, Oyster Bay bombarded shore installations on the Wicki River and at Samar Village, preparatory to U.S. Army attacks.

A British Royal Air Force plane struck the top of the ship's mast, carried away her antennae and damaged her navigation lights on 22 July 1944, but hasty repairs permitted Oyster Bay to depart for Mios Woendi on 16 August 1944.

Two Mitsubishi A6M "Zeke" fighters dived on Oyster Bay on the 26 November 1944, but intense antiaircraft fire shot them both down.

In January 1945, Oyster Bay got underway for Hollandia, then returned to Leyte Gulf for motor torpedo boat tender operations on 8 February 1945.

Decommissioned on 26 March 1946, Oyster Bay was stricken from the Naval Vessel Register on 12 April 1946, and transferred to the Maritime Commission on 12 August 1946.

Transferred back to the U.S. Navy on 3 January 1949, Oyster Bay was reclassified as a small seaplane tender and redesignated AVP–28 on 16 March 1949.