Turnour Island is an island in the Johnstone Strait region of the Central Coast of British Columbia, located between Gilford Island and West Cracroft Island. On the other side Canoe Passage on its northwest is Village Island, while to its south and southwest is Beware Passage, across from which is Harbledown Island. Gilford Island is to the north across Tribune Channel. Separating Turnour from West Cracroft is Clio Channel.