Convoy QS-15 was a trade convoy of merchant ships during the Second World War. It was one of the numbered QS Convoys which travelled from Québec to Sydney. The convoy was attacked in the early weeks of the Battle of the St. Lawrence, in the St. Lawrence River and Gulf of St. Lawrence, when German U-boats were making ad hoc forays deep into Canadian waters. The convoy was found on 6 July 1942 by U-132, which then sank three ships. U-132 was attacked and damaged by the convoy escort ship HMCS Drummondville.