USS Elfin (SP-965)

The second USS Elfin (SP-965) was a United States Navy patrol vessel in commission from 1917 to 1918.

Elfin was built in 1911 as a private motorboat of the same name by Britt Brothers at Lynn, Massachusetts. In July 1917, the U.S. Navy leased her from her owner, Alfred W. Gibbs of Wayne, Pennsylvania, for use as a section patrol boat during World War I. She was commissioned as USS Elfin (SP-965) on 26 July 1917.

Assigned to the 4th Naval District, Elfin served on patrol duties through the end of World War I.

Elfin was returned to Gibbs on 22 November 1918.