Roes Welcome Sound is an Arctic Ocean waterway in Kivalliq Region, Nunavut, Canada. It is located in Foxe Basin and opens north to Repulse Bay. It is situated between the mainland and Southampton Island, 200 km (120 mi) north of Marble Island. Roes Welcome Sound measures 290 km (180 mi) long, and 24 to 113 km (15 to 70 mi) wide. It is named after Sir Thomas Roe, friend and sponsor of explorer Luke Fox's 1631 Arctic voyage. Capt. Parry, trying to find the Northwest Passage during his 1821 voyage.