Ellice Swamp is a large woodlot in Perth County, Ontario. The swamp covers approximately 856 hectares (2,115 acres). It is located between Stratford and Milverton in the northeastern portion of the Thames River Watershed, between the North Branch of the Thames and the Nith River.Historically, it was known as Ellice Huckleberry Swamp and was part of the Huron Tract administered by the Canada Company.