Eight ships of the Royal Navy have borne the name HMS Northumberland after the English county of Northumberland, or the Dukedom of Northumberland. Another was planned but later cancelled:
HMS Northumberland was a 70-gun third-rate launched in 1679. She was rebuilt in 1701 and was wrecked in the Great Storm of 1703.
HMS Northumberland was a 70-gun third-rate launched in 1705. She was rebuilt from 1719 to 1721, and again from 1741 to 1743 (the last time as a 64-gun ship), and was captured by the French Navy off Ushant in 1744.
HMS Northumberland was a 70-gun third-rate launched in 1750. She was converted into a storeship in 1777 and renamed HMS Leviathan. She foundered in 1780.
HMS Northumberland was a 78-gun third-rate captured from the French Navy at the Battle of the Glorious First of June in 1794 and broken up in 1795.
HMS Northumberland was a 74-gun third-rate launched in 1798, notable as the ship that carried Napoleon to his final exile on the island of Saint Helena in 1815. She was converted to a hulk in 1827 and broken up in 1850.
HMS Northumberland was a Minotaur class ironclad battleship launched in 1866. She became a depot ship in 1898 and was renamed HMS Acheron on becoming a training ship in 1904. She was converted to a hulk and renamed C8 in 1909, and renamed C68 in 1926. She was sold 1927 and later resold as the hulk Stedmound.
HMS Northumberland was to have been a County class heavy cruiser ordered in 1929 but cancelled in 1930.
HMS Northumberland is a Type 23 frigate launched in 1992 and currently in service.
HMCS Northumberland was to have been a River class frigate of the Royal Canadian Navy, but the order was cancelled in 1943.
