Porcher Island is an island in Hecate Strait, British Columbia, Canada, near the mouth of the Skeena River and southwest of the port city of Prince Rupert. The locality of Porcher Island is located near the island's northern tip at Humpback Bay, 54°05′11″N 130°23′23″W / 54.08639°N 130.38972°W. Stephens and Prescott Islands are located off its northwestern tip.