USS Hobo II (SP-783) was a United States Navy patrol vessel in commission from 1917 to 1919. Hobo II was built in 1905 as a private motorboat of the same name by the Electric Launch Company (ELCO) at Bayonne, New Jersey. On 23 June 1917, the U.S. Navy acquired her from her owner, J. S. Melcher of New York City, for use as a section patrol boat during World War I. She was commissioned at Boston, Massachusetts, as USS Hobo II (SP-783) on 24 August 1917 with Boatswain's Mate G. R. Hadlock in command. Hobo II was returned to Melcher on 17 February 1919.