USS Margo (SP-870) was a raised deck cruiser built for private use taken into the United States Navy as a Section patrol vessel in commission from 1917 to 1918 and returned to the owner after the war.

Margo was designed by John Trumpy and built as a raised deck cruiser with one funnel and tow masts in 1913 by the Mathis Yacht Building Company at Camden, New Jersey for George H. McNeely of Philadelphia.

A mantle over a hot water radiator was at the forward end of the saloon with a door on the port side leading to a toilet and the one to starboard to a galley.

[1][4] On 14 June 1917, the U.S. Navy acquired her under a free lease from her owner, George H. McNeely of Philadelphia, Pennsylvania, for use as a Section patrol boat during World War I.

[4][5] Margo was assigned to the 4th Naval District and based at Philadelphia carrying out patrol duties in the Delaware River area for the rest of World War I and was returned to McNelly on 4 December 1918.