Triple Island is a rocky, barren islet, marked by Triple Island Lightstation, located approximately halfway between the southwestern tip of Dundas Island and the westernmost tip of Stephens Island, islands of the North Coast of British Columbia, Canada about 40 kilometres (25 miles) west of Prince Rupert. Triple Island is also approximately 6 kilometres (3.7 miles) southwest of Melville Island, a smaller island and a part of the Dundas Island group. It hosts a helipad (IATA: YTI).