USS Shirin (SP-915) was a United States Navy patrol vessel in commission from 1917 to 1918.

History
United States
Name	USS Shirin
Namesake	Previous name retained
Builder	Gas Engine and Power Company, Morris Heights, the Bronx, New York
Completed	1896
Acquired	23 May 1917
Commissioned	2 June 1917
Decommissioned	18 December 1918
Fate	Sold 29 June 1921
Notes	Operated as private motorboat Shirin 1896-1917
General characteristics
Type	Patrol vessel
Tonnage	59 Gross register tons
Length	110 ft (34 m)
Beam	15 ft (4.6 m)
Draft	4 ft (1.2 m)
Speed	13.5 knots
Complement	9
Armament	2 × 3-pounder guns 2 × machine guns

Shirin was built as a private motorboat of the same name in 1896 by the Gas Engine and Power Company at Morris Heights in the Bronx, New York. On 23 May 1917, the U.S. Navy acquired her from her owner, S. T. Rhea, Jr., of New Orleans, Louisiana, for use as a section patrol boat during World War I. She was commissioned as USS Shirin (SP-915) on 2 June 1917.

Shirin patrolled at New Orleans and in the vicinity of Pensacola, Florida, for the rest of World War I.

Shirin was decommissioned at New Orleans on 18 December 1918. She was sold on 29 June 1921 to Stewart McDonald of St. Louis, Missouri.