The Union of South American Nations (Dutch: Unie van Zuid-Amerikaanse Naties (help·info) - UZAN, Portuguese: União de Nações Sul-Americanas - UNASUL, Spanish: Unión de Naciones Suramericanas - UNASUR) is an intergovernmental union integrating two existing customs unions: Mercosur and the Andean Community of Nations, as part of a continuing process of South American integration. It is modelled on the European Union.

The UNASUR Constitutive Treaty was signed on May 23, 2008, at the Third Summit of Heads of State, held in Brasília, Brazil. According to the Constitutive Treaty, the Union's headquarters will be located in Quito, Ecuador. The South American Parliament will be located in Cochabamba, Bolivia, while its bank, the Bank of the South (Dutch: Bank van het Zuiden, Portuguese: Banco do Sul, Spanish: Banco del Sur), will be located in Caracas, Venezuela. The Union's former designation, the South American Community of Nations (Dutch: Zuid-Amerikaanse Statengemeenschap (help·info), Portuguese: Comunidade Sul-Americana de Nações, and Spanish: Comunidad de Naciones Suramericanas), abbreviated as CSN, was dropped at the First South American Energy Summit on April 16, 2007.

• Argentina
• Bolivia
• Brazil
• Chile
• Colombia
• Ecuador

• Guyana
• Paraguay
• Peru
• Suriname
• Uruguay
• Venezuela

• See also
• External links

Argentina

• Step by step CAN and Mercosur will converge becoming the South American Community, but gradually disappearing at the same time. But in spite of the haste there’s no rush, because we could end with an empty declaration. [...] My idea is that in a few months time CAN [Comunidad Andina de Naciones] should be known as South American Community-CAN and Mercosur [Mercado Común del Sur], South American Community MS, so we have time to get in touch with the new initials. — Former Argentine president Eduardo Duhalde, president of the Mercosur Representatives Committee.

Bolivia