Bribie Island is the smallest and most northerly of three major sand islands forming the coastline sheltering the northern part of Moreton Bay, Queensland, Australia. The others are Moreton Island and North Stradbroke Island. Bribie Island is 34 kilometres (21 miles) long, and 8 kilometres (5.0 miles) at its widest. Archibald Meston believed that the name of the island came from a corruption of a mainland word for it, Boorabee meaning koala. However, the correct Joondaburri name for the island is Yarun.
Bribie Island hugs the coastline and tapers to a long spit at its most northern point near Caloundra, and is separated from the mainland by Pumicestone Passage. The ocean side of the island is somewhat sheltered from prevailing winds by Moreton Island and associated sand banks and has only a small surf break. The lee side is calm, with white sandy beaches in the south.
