This article is about an island group in James Bay. For the island in the Labrador Sea, see Bear Island (Nunavut). For other islands worldwide with the same name, see Bear Island (disambiguation).
From 1957 to 1965, Bear Island was a radar site on the Mid-Canada Line and also housed a petroleum depot and small airfield. After being abandoned, it lay derelict. In 1996 it was identified for remediation, and this work was completed during the summer of 2010 at a cost of $5.5 million.