Admiral of the Fleet Sir Houston Stewart, GCB (3 August 1791 – 10 December 1875) was a Royal Navy officer and briefly a Liberal Party Member of Parliament.

Stewart served as Third Naval Lord before entering the House of Commons as Liberal Party Member of Parliament MP for Greenwich.

He became Admiral Superintendent of Malta Dockyard and then second-in-command in the Black Sea taking part in the Siege of Sevastopol and commanding the fleet at the capture of Kinburn during the Crimean War.

[2] He transferred to the third-rate HMS Revenge and took part in the blockade of Brest and then in the action of 25 September 1806 when four French frigates were captured by a squadron commanded by Commodore Sir Samuel Hood during the Napoleonic Wars.

[2] He transferred to the fifth-rate HMS Imperieuse, commanded by Captain Thomas Cochrane, in October 1806 and took part in various raids on the Mediterranean coast of France during 1807 and in the defence of Rosas, which was under siege by the French Army, in November 1808.

[4] He became commanding officer of the third-rate HMS Benbow in the Mediterranean Fleet in April 1839 and took part in the bombardment of Acre in November 1840 during the Egyptian–Ottoman War.

[3] Stewart became Captain-Superintendent of Woolwich Dockyard and Captain of the royal yacht HMY William and Mary in May 1846 and Controller-General of the Coastguard in November 1846.