Erwin Rostin (8 October 1907 in Güstrow – killed in action 1 July 1942 in Atlantic Ocean) was a German U-boat commander in World War II and recipient of the Knight's Cross of the Iron Cross. The Knight's Cross of the Iron Cross was awarded to recognise extreme battlefield bravery or successful military leadership. He is numbered thirty-one in the list of U-Boat aces of World War II.