North Island is the northernmost island in the Houtman Abrolhos, a coral reef archipelago in the Indian Ocean off the coast of Mid West Western Australia. Located approximately 14 km (9 mi) from the nearest island group, it is one of the largest islands in the Houtman Abrolhos, and is of the few to support dune systems. It has relatively diverse flora dominated by chenopod shrubs and fauna that includes the introduced Tammar Wallaby, around 7 species of reptile, and about 15 resident bird species.
Discovered and surveyed in 1840, North Island has been a seasonal camp for western rock lobster fishermen since the beginning of the 20th century, and this remains the principal focus of human activity on the island. There is also a small amount of tourism, though for the most part it is reserved as conservation habitat for vegetation communities and rare birds.