Two ships of the United States Navy have been named Oahu after Oahu, the third largest of the Hawaiian Islands.

• USS Oahu (PR-6), was launched 26 November 1927 and sunk by enemy torpedoes on 5 May 1942.
• USS Oahu (ARG-5), was launched 9 September 1943 and decommissioned in January 1947.

•  This article incorporates text from the public domain Dictionary of American Naval Fighting Ships. The entry can be found here.

This article includes a list of ships with the same or similar names. If an internal link for a specific ship led you here, you may wish to change the link to point directly to the intended ship article, if one exists.