William Bainbridge (May 7, 1774 – July 27, 1833) was a Commodore in the United States Navy. During his long career in the young American Navy he served under six presidents beginning with John Adams and is notable for his many victories at sea. He commanded several famous naval ships, including the USS Constitution and saw service in the Barbary Wars and the War of 1812. Bainbridge was also in command of the USS Philadelphia when it grounded off the shores of Tripoli in North Africa, resulting in his capture and imprisonment for many months. In the latter part of his career he became the U.S. Naval Commissioner.