Dease Strait is an eastâÂÂwest waterway between the mainland's Kent Peninsula and Victoria Island in Nunavut, Canada. It is part of the Northwest Passage. At its eastern end, approximately wide, is Cambridge Bay; to the west it widens to approximately and becomes Coronation Gulf. The strait is long.
The Strait is named after the Canadian explorer Peter Warren Dease, who was the first to navigate it along with the Scottish explorer Thomas Simpson.