Eight vessels of the Royal Navy have been named HMS Triton or HMS Tryton, after Triton, the son of Poseidon and Amphitrite, and the personification of the roaring waters:
- HMS Tryton was a 42-gun fifth-rate, originally the French ship Triton, captured by the British in 1702 at the battle of Vigo Bay, and sold in 1709.
- HMS Tryton was a sloop in commission in 1741.
- HMS Tryton was a 24-gun sixth-rate frigate launched in 1745 and burned on 28 April 1758 to avoid capture by the French.
- HMS Triton was a 28-gun sixth-rate frigate launched in 1771. She served with Rear Admiral Sir Samuel Hood's fleet off Nevis on 25 January 1782. She was broken up in 1796.
- HMS Triton was a 32-gun fifth-rate frigate launched in 1796. She served in the French Revolutionary and Napoleonic Wars and was broken up in 1820.
- HMS Triton was an iron paddle sloop launched in 1846 and sold in 1872.
- HMS Triton was a paddle survey vessel launched in 1882. She was a school ship at Gravesend from 1919, and was broken up in 1961.
- HMS Triton was a T class submarine launched in 1937 and sunk in 1940.