Lancaster Sound (Inuktitut ᑕᓪᓗᕈᑎᐅᑉ ᑕᕆᐅᖓ Tallurutiup Tariunga) is a body of water in Qikiqtaaluk, Nunavut, Canada. It is located between Devon Island and Baffin Island, forming the eastern entrance to the Parry Channel and the Northwest Passage. East of the sound lies Baffin Bay; to the west lies Viscount Melville Sound.