Sir John Borlase Warren, an English admiral, born at Stapleford, Nottinghamshire, in 1754, died in Greenwich, Feb. 27, 1822. He was a midshipman on the Alderney sloop of war for some time in the North sea, and afterward studied at Cambridge. In 1774 he entered parliament, and in 1775 was created a baronet. When the American war began, he became a lieutenant in the Nonsuch, and in 1779 commander of the Helena sloop of war. In 1780 he was reelected to parliament, and in 1781 attained the rank of post captain. In 1793, on the commencement of the war with France, he was appointed to the Flora frigate, and in 1795 commanded the unsuccessful expedition to Quiberon bay to assist the insurrectionists of La Vendue. In 1797 he obtained the command of the Canada of 74 guns, and after some severe service off Brest went with a strong force to the coast of Ireland, where on Oct. 11, 1798, in a conflict with a French squadron, he captured the Hoche line-of-battle ship and three frigates. For this he was made rear admiral of the blue, with the thanks of parliament. In 1793 he was elected to parliament for Nottingham, and in 1802 reelected. After the peace of Amiens he was sent to Russia as ambassador. In 1812 he had command in North America and the West Indies. At his death he was admiral of the white.

He is the supposed author of "A View of the Naval Force of Great Britain" (8vo, 1791).