USS Margo (SP-870)

USS Margo (SP-870) was a United States Navy patrol vessel in commission from 1917 to 1918.

Margo was built as a private wooden-hulled motorboat of the same name in 1913 by the Mathis Yacht Building Company at Camden, New Jersey. On 14 June 1917, the U.S. Navy acquired her under a free lease from her owner, G. H. McNelly of Philadelphia, Pennsylvania, for use as a section patrol boat during World War I. She was commissioned the same day as USS Margo (SP-870) with Ensign Rick F. Nowell, USNRF, in command.

Assigned to the 4th Naval District and based at Philadelphia, Margo carried out patrol duties in the Delaware River area for the rest of World War I.

Margo was returned to McNelly on 4 December 1918.