ABSTRACT This paper analyses the involvement of Latin America in the legal aspects of the Antarctic Treaty System. Eleven of the twenty Latin American countries are part of at least one of the Antarctic Treaty System legal instruments. Using the information shared by them through the Electronic Information Exchange System run by the Antarctic Treaty Secretariat, this paper evaluates the incorporation of the Antarctic Treaty System instruments and agreements in domestic legislation in Latin American states. Additionally, the paper evaluates the domestic rules Latin American states have enacted on Antarctic matters by their own initiative. Some countries, like Chile in first position and Argentina in second position, have well developed legislation related to Antarctic issues, but in other countries it is less developed or less reported. This general assessment reveals the challenges for Latin America in growing its influence in Antarctic governance and in the Antarctic Treaty System as a political-legal regimen.