HMS Neptune

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Nine ships and a naval base of the Royal Navy have been named HMS Neptune after the Roman god of the ocean:

• {{HMS|Neptune|1683}} was a 90-gun second rate launched in 1683. She was rebuilt in 1710 and 1730 before being renamed HMS Torbay in her new incarnation as a third rate in 1750. She was sold in 1784.
• {{HMS|Neptune|1757}} was a 90-gun second rate launched in 1757. She was hulked in 1784 and broken up in 1816.
• {{HMS|Neptune|1797}} was a 98-gun second rate launched in 1797. She fought at the battle of Trafalgar and was broken up in 1818.
• HMS Neptune was to have been a 120-gun first rate. She was renamed {{HMS|Royal George|1827}} in 1822, before being launched in 1827. Royal George was sold in 1875.
• {{HMS|Neptune|1832}} was a 120-gun first rate launched in 1832. She was rebuilt as a 72-gun third rate with screw propulsion in 1859 and was sold in 1875.
• {{HMS|Neptune|1863}} was a coastguard cutter built in 1863 and sold in 1905.
• {{HMS|Neptune|1874}} was an ironclad warship launched in 1874 as Independência, intended for the Brazilian Navy. Acquired by the Royal Navy in 1878, she was sold in 1903.
• {{HMS|Neptune|1909}} was an early dreadnought launched in 1909 and scrapped in 1922.
• {{HMS|Neptune|20}} was a {{sclass|Leander|cruiser (1931)|0}} light cruiser launched in 1933 and sunk in a minefield off Tripoli in 1941.
• HMS Neptune was a projected {{sclass|Neptune|cruiser}} in the 1945 Naval Estimates, but the plans were cancelled in March 1946 and she was never ordered.
• HMS Neptune (shore establishment) is the name given to the shore establishment at HMNB Clyde.