USS Betty M. II (SP-623) was a United States Navy patrol vessel in commission from 1917 to 1918. Betty M. II was built as a private motorboat of the same name by the Church Boat Company at Sibley, Michigan, in 1916. In 1917, the U.S. Navy acquired her under a free lease from her owner, Charles W. Kotcher of Detroit, Michigan, for use as a section patrol boat during World War I. She was commissioned at Detroit as USS Betty M. II (SP-623) on 4 September 1917 with Chief Boatswain's Mate D. C. McKay, USNRF, in command.