The Battle of Cook’s Mills National Historic Site of Canada is a rolling semi-rural landscape east of the Welland Canal bordering the north bank of Lyon’s Creek in the City of Welland, Ontario. It was the site of an engagement between British and Canadian troops and American forces during the War of 1812. There are no known extant remains of the battle; however, a cairn and plaque erected by the Historic Sites and Monuments Board of Canada in 1977 marks the south-west corner of the battle site. Official recognition refers to the designated polygon north of Lyon’s Creek.