The 2005 World Aquatics Championships or the XI FINA World Championships were held in Montreal, Quebec, Canada from July 16 to July 31, 2005. They took place in Parc Jean-Drapeau on Saint Helen's Island.

Jean Drapeau Park is the third-largest park in Montreal, Quebec, Canada. It comprises two islands, Saint Helen's Island and the artificial island Notre Dame Island, situated off the shore of Old Montreal in the Saint Lawrence River.