Griffith Island is an island in Georgian Bay, in the province of Ontario, Canada. It is one of three islands in Colpoy's Bay, and sits to the north east of Wiarton and north of Owen Sound. The other two islands in Colpoy's Bay are White Cloud Island and Hay Island. From the early 1970s, the island has been owned by and in private use of the Griffith Island Club, principally for recreational shooting and hunting. A small part of the island is currently owned by the federal government of Canada and hosts the Griffith Island lighthouse. The lighthouse was built originally in 1859 and is one of six limestone lighthouses built in the 1850s in Georgian Bay by the Canadian federal government.