Prince Regent Inlet is a body of water in Nunavut, Canada between the west end of Baffin Island and Somerset Island on the west. It opens north into Lancaster Sound and to the south merges into the Gulf of Boothia. The Arctic inlet's northern portion is approximately 40 mi (64 km) wide; the southern portion is approximately 65 mi (105 km) wide. It is deep throughout and there are no islands within the inlet.