Three ships of the United States Navy have borne the name USS Seahorse or Sea Horse, named in honor of the seahorse, a small fish whose head and the fore part of its body suggest the head and neck of a horse.
USS Sea Horse (1812) was a one-gun schooner, purchased by the Navy in 1812 for service in the War of 1812. She was beached and burned to prevent capture in 1814.
USS Seahorse (SS-304) was a Balao-class submarine, commissioned in 1943 and stricken in 1967.
USS Seahorse (SSN-669) was a Sturgeon-class submarine, commissioned in 1969 and stricken in 1995.
