Five ships and submarines of the United States Navy and United States Coast Guard have been named USS Triton, for Triton, a Greek demigod of the sea who was the son of Poseidon and Amphitrite.
- The first USCGC Triton was a 165-foot cutter which operated out of United States Coast Guard Base 15 at Biloxi, Mississippi during what was refered to at the time as "the Prohibition War" -- operations against alcohol smugglers during Prohibition.
- The second USS Triton (YT-10), a 212-ton tug, was built at Camden, New Jersey, in 1889 and purchased in that year by the United States Navy. Her long career was spent operating out of the Washington Navy Yard with frequent trips to Indian Head, Maryland. In 1921, she was designated YT-10. Triton was struck from the Naval Vessel Registry in May 1930 and sold the following September.
- The third USS Triton (SS-201) was lost during World War II.
- The fourth USCGC Triton (WPC/WMEC-116) was a United States Coast Guard patrol boat that served almost simultaneously with the previous submarine.
- The fifth USS Triton (SSRN/SSN-586), a nuclear-powered radar picket submarine, was the first vessel to execute a submerged circumnavigation of the Earth.