The Maroni or Marowijne is a river in South America that forms the border between French Guiana and Suriname.

French Guiana is an overseas department and region of France located on the northern coast of South America in the Guianas and the West Indies. Bordered by Suriname to the west and Brazil to the east and south, French Guiana covers a total area of 84,000 km2 (32,000 sq mi) and a land area of 83,534 km2 (32,253 sq mi), and is inhabited by 295,385 people.