La Ronde (Round) is an amusement park in Montreal, Quebec, Canada, built as the entertainment complex for Expo 67, the 1967 world fair. Today, it is owned and operated by Six Flags. The park is under an emphyteutic lease with the City of Montreal, which expires in 2065. It is the largest amusement park in Quebec, and second largest in Canada.
It is on 146 acres (59.1 ha) located on the Northern tip of Saint Helen's Island. This is a man-made extension to the island in the space where the small Ronde Island had been. The park hosts L'International des Feux Loto-Québec, a highly regarded international fireworks competition. La Ronde is one of two Six Flags parks not to be officially branded as a Six Flags park (the other being Great Escape in Queensbury, New York).