Oak Island is a privately owned island in Lunenburg County on the south shore of Nova Scotia, Canada. The tree-covered island is one of several islands in Mahone Bay, and is connected to the mainland by a causeway. The nearest community is the rural community of Western Shore which faces the island, while the nearest village is Chester. The island is best known for various theories about buried treasure or historical artifacts, and the associated attempts to explore the site.

Mahone Bay is a bay on the Atlantic coast of Nova Scotia, Canada along the eastern end of Lunenburg County. The bay has many islands, and is a popular sailing area. Since 2003 the Mahone Islands Conservation Association has been working to protect the natural environment of the bay. The bay and its islands contain a variety of habitats including forests, rocky shores, beaches, wetlands, and mudflats. Wildlife in the area include black guillemots, eagles, osprey, leach's storm petrels, puffins, razorbills, and great blue herons.