On the day of its independence, 21 September 1981, Belize applied for membership to the United Nations and in so doing declared its acceptance of the obligations contained in the Charter of the United Nations and solemnly undertook to fulfill them.

Upon the recommendation of the Security Council, the General Assembly admitted Belize to membership in the United Nations on 25 September 1981. 

Since its admission, Belize has been represented on several UN Bodies:  Commission on the Status of Women, Commission on Sustainable Development, Committee on Information, and the Economic and Social Council.

Belize is a member of the Alliance of Small Island Developing States (AOSIS), the Caribbean Community (CARICOM), the Central American Integration System (SICA), the Group of 77 and China (G-77), the Latin American and Caribbean Group (GRULAC), the Non Aligned Movement, and the Rio Group.

Belize remains fully committed to the purposes and principles of the United Nations and maintains a foreign policy that is consistent with the Charter.