Frederick Warren (March 1775 – 22 March 1848) was an officer of the Royal Navy who served during the French Revolutionary and Napoleonic Wars, and the Gunboat War, rising to the rank of vice-admiral.
Born in March 1775, he was son of Richard Warren the physician, and elder brother of Pelham Warren. He was admitted to Westminster School on 15 January 1783, and entered the navy in March 1789, on board HMS Adamant, flagship of Sir Richard Hughes on the Halifax station.
When the Adamant was paid off in 1792, Warren was sent to HMS Lion with Captain Erasmus Gower, and in her made the voyage to China. Shortly after his return, on 24 October 1794, he was confirmed in the rank of lieutenant and appointed to HMS Prince George. He then served in HMS Jason on the home station, and in HMS Latona off Newfoundland, where he was promoted on 10 August 1797 to command the sloop HMS Shark. In 1800 he commanded HMS Fairy in the West Indies.