Quadra Island is an island off the eastern coast of Vancouver Island, British Columbia, Canada, part of the Discovery Islands. It is separated from Vancouver Island by Discovery Passage, and from Cortes Island by Sutil Channel. The population of Quadra Island and surrounding mainland inlets as of the 2006 federal census count (excluding Indian Reserves tallied separately) was 2,472, down from the 2001 federal census count of 2,548
