The flag of Guyana, known as the Golden Arrowhead, has been the national flag of Guyana since May 1966, when the country became independent from the United Kingdom. It was designed by Whitney Smith, an American vexillologist (though originally without the black and white fimbriations, which were later additions suggested by the College of Arms in the United Kingdom). The proportions of the national flag are 3:5.

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Co-operative Republic of Guyana

The Golden Arrowhead
Use	National flag
Proportion	3:5
Adopted	26 May 1966; 57 years ago (1966-05-26)[1]
Design	A green field with the black-edged red isosceles triangle based on the hoist-side superimposed on the larger white-edged golden triangle, also based on the hoist-side, pointed toward the fly-side.
Designed by	Whitney Smith
Use	National ensign
Proportion	1:2
Design	An elongated version of the above.
Use	Civil air ensign
Proportion	7:11
Design	British Civil Air Ensign combined with national flag of Guyana. May be flown at airports and from landed aircraft.

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The colours are symbolic:

• red for zeal and dynamism,
• gold for mineral wealth,
• green for agriculture and forests,
• black for endurance,
• white for rivers and water.

The civil air ensign is a copy of the British Civil Air Ensign, with the Guyanese flag in the canton. The naval ensign of Guyana is a version of the national flag, with proportions of 1:2.

As part of the British Empire, Guyana's flag was a Blue Ensign with the colonial badge in the fly. An unofficial red version was used at sea.^[2] The first flag was introduced in 1875 and was changed slightly in 1906 and 1955.^[3] Like all British Ensigns, the colonial flags of Guyana were all ratio 1:2.

The Presidential Standard of Guyana came into effect by Proclamation issued on 23 February 1970. Subsequent Presidents have amended this Proclamation to replace the description of the flag contained, to reflect the Presidential Standard they wish to introduce for the duration of their presidency.