USS Susanne (SP-411) was a United States Navy patrol vessel in commission from 1917 to 1919.

History
United States
Name	USS Susanne (1917-1918) USS SP-411 (1918-1919)
Namesake	Susanne was her previous name retained SP-411 was her section patrol number
Builder	Matthews Boat Company, Port Clinton, Ohio
Completed	1916
Acquired	May 1917
Commissioned	3 August 1917
Stricken	15 November 1919
Fate	Sold 15 November 1919
Notes	Operated as private motorboat Susanne 1916-1917
General characteristics
Type	Patrol vessel
Tonnage	26 gross register tons
Length	76 ft 6 in (23.32 m)
Beam	13 ft (4.0 m)
Draft	3 ft 4 in (1.02 m) aft
Speed	23 knots
Complement	11
Armament	1 × 3-pounder gun 2 × machine guns

Susanne was built as a private motorboat of the same name in 1916 by the Matthews Boat Company at Port Clinton, Ohio. In May 1917, the U.S. Navy acquired her from her owner, T. J. Prindiville of Chicago, Illinois, for use as a section patrol boat during World War I. She was commissioned as USS Susanne (SP-411) on 3 August 1917.

Assigned to the 9th Naval District, Susanne served on patrol duties on the Great Lakes for the remainder of World War I. She was renamed USS SP-411 in 1918.

SP-411 was stricken from the Navy List and sold on 15 November 1919.

Susanne (SP-411) should not be confused with the motorboat Susanne, also constructed by the Matthews Boat Company and inspected for World War I Navy service as USS Susanne (SP-832) but never commissioned, or with the patrol vessel USS Suzanne (SP-510), which was in commission at the same time.