Amherstburg is a town near the mouth of the Detroit River in Essex County, Ontario, Canada. In 1796, Fort Malden was established here, stimulating growth in the settlement. The fort has been designated as a National Historic Site. The town is approximately 25 kilometres south of the U.S. city of Detroit, Michigan, facing Wyandotte, Grosse Ile Township, Brownstown Charter Township, Trenton, and Gibraltar, Michigan. It is part of the Windsor census metropolitan area.