Second Opium War Admiral Keith Stewart CB (3 January 1814 – 15 September 1879) was a British aristocrat and Naval officer, from an influential political and military family.

[1] Stewart entered the Navy as a midshipman on 3 April 1827, aged 13 on HMS Asia, flagship of Admiral Sir Edward Codrington in the Battle of Navarino.

[2] He gained his commission on 13 June 1833 and was appointed lieutenant of Asia on 17 August 1833, at that point the flagship of Rear-Admiral Sir William Parker.

[2] Stewart served from 11 October 1833 until December 1835 at which point he was appointed to HMS Stag under Captain Nicholas Lockyer just off Portugal where he served until 15 February 1837 at which point he was appointed to HMS Cornwallis, the flagship of Vice-Admiral Sir Charles Paget on the North America and West Indies Station.

[3][2] From 1857 to 1859 Stewart was gazetted three times for his service during the Second Opium War and in March 1857 he was promoted to commodore and appointed a Companion of the Order of the Bath.