Amherst Island is located in Lake Ontario, west of Kingston, Ontario, Canada. Contrary to popular perception, Amherst Island is not one of the Thousand Islands. The island is part of Loyalist Township in Lennox and Addington County. Amherst Island is located about offshore from the rest of Loyalist Township and is serviced by an automobile and truck ferry from Millhaven. The island measures over in length from Bluff Point in the southwest to Amherst Bar in the northeast and over at its widest point across. The island is about in size and is one of the largest islands in the Great Lakes.