The General Assembly is the supreme decision-making body of the Organization of American States (OAS). The Organization of American States (OAS; OEA in the other three official languages) is an international organization, headquartered in Washington, D.C., USA. Its members are the 35 independent nations of the Americas. ...

The General Assembly came into being as a part of the restructuring of the OAS that took place following adoption of the Protocol of Buenos Aires (signed 27 February 1967; in force as of 12 March 1970), which contained extensive amendments to the Organization's Charter. Prior to these changes, the OAS's top body was the Inter-American Conference, which in turn was the successor to the International Conference of American States.

The Charter requires that the General Assembly convene once every year in a regular session. In special circumstances, and with the approval of two-thirds of the member states, the Permanent Council can convene special sessions.

The Organization's member states take turns hosting the General Assembly on a rotating basis. The states are represented at its sessions by their chosen delegates: generally, their ministers of foreign affairs, or their appointed deputies. Each state has one vote, and most matters – except for those for which the Charter or the General Assembly's own rules of procedure specifically require a two-thirds majority – are settled by a simple majority vote.

The General Assembly's powers include setting the OAS's general course and policies by means of resolutions and declarations; approving its budget and determining the contributions payable by the member states; approving the reports and previous year's actions of the OAS's specialized agencies; and electing members to serve on those agencies.