thumb|right|270px|Bear Island Light Station tower in Acadia National Park, Maine, USA. 2007
Bear Island is an island in Maine, United States. It is one of the five islands of the Town of Cranberry Isles. The island is located just off Northeast Harbor and south of Mount Desert Island.
Bear Island Light, on the western end of the island, was built in 1889 and staffed until 1981. The rest of the island was bought by Harvard professor Charles F. Dunbar in 1886.