The governor of British Guiana was the representative of the Crown in British Guiana. The office existed from 1831 when the colonies of Demerara-Essequibo (see Demerara and Essequibo) and Berbice united as British Guiana until 1966 when Guyana attained independence.
On 26 May 1966, the colony achieved independence from the United Kingdom as Guyana. After independence, the viceroy in Guyana was the Governor-General of Guyana.