USS Nirvana II (SP-204) was a United States Navy patrol vessel in commission from 1917 to 1918.

Nirvana II was built as a civilian motorboat of the same name in 1916 by Brett Brothers at West Lynn, Massachusetts.

The U.S. Navy acquired her from her owner, J. Hartley Merrick of Philadelphia, Pennsylvania, on 18 May 1917 for World War I service as a patrol vessel.

In September 1917, she joined the Special Cruising Squadron, adding status to her patrol duties.

Decommissioning at Philadelphia on 30 November 1918, Nirvana II was returned to her owner on 2 December 1918.