The Mercosur Parliament, known also as Parlasur, or Parlasul, is the parliamentary institution of the Mercosur trade bloc. It is composed of 81 MPs, 18 from each member states of the bloc – Argentina, Brazil, Paraguay and Uruguay – and 9 from applying member Venezuela. Associate members – Bolivia, Chile, Colombia, Ecuador and Peru – may also hold seats in the Parliament, but with no voting powers.

The Latin American Parliament (Parlatino) is a regional, permanent organization composed by the countries of Latin America and the Caribbean. It is a consultative assembly similar to the early European Parliament. Currently the institution is being considered to become the legislative organ of the Community of Latin American and Caribbean States.