Lieutenant-General Sir Henry George Grey GCB GCH (25 October 1766 – 11 January 1845) was a British Army officer who served as acting Governor of Cape Colony.
Grey served throughout this period as an aide de camp to his father at Plymouth, being promoted to lieutenant on 28 July 1781 in the 30th Regiment of Foot and then transferring to the 17th Dragoons on 7 March the following year.
Still officially part of the 18th Dragoons, on 1 September 1795 he became a substantive major in the regiment but did not re-join it, instead continuing his staff career as an assistant quartermaster general in Britain.
Promotion to major-general followed on 1 January 1805, and he served as a staff officer in Britain until 11 July 1806 when he was appointed Commander-in-Chief, Cape of Good Hope, being made a local lieutenant-general for the purpose.
[4] Having been promoted to substantive lieutenant-general on 4 June of the latter year, Grey returned to Britain in November, assuming command of a military district.