USS Lexington II (SP-705), later USS SP-705, was an American patrol vessel in commission from 1917 to 1918. Lexington II was built as a private motorboat of the same name in 1911 by the New York Yacht, Launch & Engine Company at Morris Heights in the Bronx, New York. On 13 July 1917, the U.S. Navy chartered her from her owner, Dale B. Fitler of Philadelphia, Pennsylvania, for use as a section patrol boat during World War I. Delivered to the Navy on 22 July 1917, she was commissioned as USS Lexington II (SP-705) on 23 July 1917 at Camden, New Jersey. She was enrolled in the on 26 July 1917.