USS Herman S. Caswell

USS Herman S. Caswell (SP-2311) was a United States Navy patrol vessel in service from 1918 to 1919.

Herman S. Caswell was built as a civilian passenger yacht or ferry of the same name in 1878 at Noank, Connecticut. On 8 October 1918, the U.S. Navy chartered her from her owner, New York Sightseeing Yachts, for use as a section patrol boat during World War I. She was placed in service as USS Herman S. Caswell (SP-2311).

Assigned to the 3rd Naval District, Herman S. Caswell served on patrol and harbor duties until returned to New York Sightseeing Yachts on 7 March 1919.