Seven vessels of the British Royal Navy have been named HMS Valiant.
- HMS Valiant (1755), a schooner launched at Oswego, New York, Thirteen Colonies and captured by the French in 1756.[1]
- HMS Valiant (1759), launched in 1759 at Chatham, was a third-rate ship of the line of 74 guns.
- HMS Valiant (1807), launched in 1807, was a Repulse-class third-rate.
- HMS Valiant was ordered in June 1825 as another third-rate, but was cancelled in February 1831.
- HMS Valiant (1863), launched in 1863, was a Hector-class ironclad battleship, scrapped in 1957.
- HMS Valiant (1914), launched in 1914, was a Queen Elizabeth-class battleship that served in World War I and World War II.
- HMS Valiant (S102), launched in 1963, was a nuclear-powered submarine, the lead boat of her class. She was paid off in 1994.
- HMS Valiant will be the second boat of the Dreadnought-class submarine class.