The second USS Lynx (SP-2) was an armed motorboat that served in the United States Navy as a patrol vessel and aviation support craft from 1917 to 1919.

Lynx was built as a private motorboat of the same name in 1916 by the George Lawley & Son at Neponset, Massachusetts.

Her owner, Nathaniel F. Ayers,[1] had her built specifically for participation in the Coast Defense Reserve as part of the Preparedness Movement.

Lynx initially served as a patrol boat in the 2nd Naval District, based at Newport, Rhode Island.

Lynx returned to the United States after World War I, arriving at New York City from Europe on 30 March 1919.