Cortes Island is an island in the Discovery Islands archipelago on the coast of British Columbia, Canada. The island is 25 km (15.5 mi) long, 13 km (8.1 mi) wide, and 130 km 2 (50 sq mi) in area. It has a population of 1,035 permanent residents (2016 census). Cortes Island lies within Electoral Area B of the Strathcona Regional District, which provides water and sewerage systems, fire ...