Gambier Island is an island located in Howe Sound near Vancouver, British Columbia. It is about 17,049 acres (6,899 hectares) in size and is located about 10 kilometres (6.2 miles) north of the Horseshoe Bay community and ferry terminal in westernmost West Vancouver.
A rugged and sparsely populated island, it is far quieter than its neighbour Bowen Island, which is popular with day-trippers and summer vacationers. Gambier Island is accessible only by B.C. Ferries passenger service, water taxi or other boats. There is no central road network.
The island elects two trustees to the Islands Trust, an organization that unites small island communities in British Columbia to oversee development and land use. Other islands in Howe Sound include Keats Island and Anvil Island. The island is part of West Howe Sound, Electoral Area F within the Sunshine Coast Regional District (SCRD) on the Sunshine Coast of British Columbia, Canada.