The South American nation that is still an overseas region of France is French Guiana. It is an overseas department and region of France located on the northeastern coast of South America, bordered by Brazil to the south and east, Suriname to the west, and the Atlantic Ocean to the northeast

. French Guiana has the same administrative status as regions in metropolitan France and is fully integrated into the French Republic and the European Union, using the euro as its currency

. French Guiana is part of the Guianas region and is the only French overseas department in South America

. It is governed as an integral part of France, with representation in the French National Assembly and European Parliament

. The territory is known for its dense equatorial forests, colonial towns, and the European Space Agency's rocket launch site in Kourou

. In summary, French Guiana is the South American overseas region of France.