Sir William MacBean George Colebrooke, KH, CB (9 November 1787 – 6 February 1870) was an English career soldier and colonial administrator.
The son of Colonel Paulet Welbore Colebrooke, R.A. (died 1816), and a daughter of Major-General Grant, he was educated at Woolwich, entering the Royal Artillery as a first lieutenant on 12 September 1803.
In this government, as in the Bahamas, he tried to improve education and reform prison discipline; he also urged the restoration of the old general council of the Leewards.
[1] On 25 July 1840, Colebrooke left Antigua for Liverpool and, after an extended leave, was, on 26 March 1841, made lieutenant-governor of New Brunswick.
Here his tenure of office was uneventful, the question of the Maine boundary being the chief public matter affecting the colony at that time; he did, however, suggest a special scheme for colonisation, which had no practical results.
On 27 November 1847 he was gazetted to British Guiana, but never took up the appointment, going instead on 11 August 1848, as governor, to Barbados, where he also administered the Windward Islands.
He was promoted Lieutenant-general on 16 January 1859 and general 26 December 1865, and he was colonel commanding the Royal Artillery from 25 September 1859 until his death.