USS Parthenia (SP-671) was a United States Navy patrol vessel in commission from 1917 to 1919 or 1920. Parthenia was built as a private steam yacht of the same name by the Herreshoff Manufacturing Company at Bristol, Rhode Island, in 1903. On 15 August 1917, the U.S. Navy purchased her from Colonel Harry E. Converse for use as a section patrol vessel during World War I. Converse delivered her to the Navy on 18 August 1917, and she was commissioned as USS Parthenia (SP-671). Parthenia was sold on 17 August 1920.