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