Mercosur or Mercosul (Spanish: Mercado Común del Sur, Portuguese: Mercado Comum do Sul, Guarani: Ñemby Ñemuha, Southern Common Market) is a sub-regional bloc. Its full members are Argentina, Brazil, Paraguay, Uruguay and Venezuela (which was suspended on December 1, 2016).

Its associate countries are Bolivia, Chile, Peru, Colombia, Ecuador and Suriname.^[5] Observer countries are New Zealand and Mexico.

Its purpose is to promote free trade and the fluid movement of goods, people, and currency. The official languages are Spanish, Portuguese and Guarani.^[8] It has been updated, amended, and changed many times since. It is now a full customs union and a trading bloc. Mercosur and the Andean Community of Nations are customs unions that are components of a continuing process of South American integration connected to the Union of South American Nations.