|CCGS Des Groseilliers is the third vessel of the Pierre Radisson-class icebreaker in the Canadian Coast Guard. The vessel is named after Médard Chouart des Groseilliers (1618–1669) a close associate of Pierre-Esprit Radisson in explorations west of the Great Lakes and the founding of the British Hudson's Bay Company.
In spring 2008, Des Groseilliers collided with the Sea Shepherd Conservation Society vessel, Farley Mowat, in the Gulf of Saint Lawrence, during the annual seal hunt. Paul Watson, head of the society, claimed that the icebreaker had rammed the society's research vessel. However, a spokesman for the department of Fisheries and Oceans Canada claimed that the research vessel "grazed" the icebreaker.