East Thurlow Island is an island in British Columbia, Canada. It is part of the Discovery Islands, an archipelago between Vancouver Island and the mainland, whose waters connect the Strait of Georgia with Johnstone Strait and Queen Charlotte Strait. East Thurlow Island is located north of Vancouver Island, south of the mainland, northwest of Sonora Island, and east of West Thurlow Island. East Thurlow Island is located within Electoral Area C of the Strathcona Regional District.