Guyana: Heads of State: 1966-1970
All Heads of State in the following index are also Heads of State in the United Kingdom of Great Britain and Northern Ireland, and other realms and territories.
|By the Grace of God, of the United Kingdom of Great Britain and Northern Ireland and of Her other Realms and Territories Queen, Head of the Commonwealth, Defender of the Faith|
|26 May 1966 - 18 Jun 1966||Elizabeth II|
|By the Grace of God, Queen of Guyana and of Her other Realms and Territories, Head of the Commonwealth |
|18 Jun 1966 - 23 Feb 1970||Elizabeth II (x)|
|||A notice on the issuing of a royal proclamation affecting the change in the style is published in the Official Gazette 18 Jun 1966.|