The Aur Island is an island in Mersing District, Johor, Malaysia. It lies about 76 kilometres (47 mi) east of Mersing Town and is part of the Johor Marine Park. Its corals, lagoons and offshore pools make it a tourist attraction. It has for many years also been a frequent stopover point for fishermen.
There is also a smaller island close by, Dayang Island, which is separated from Aur Island by a narrow channel of about 400 metres (1,300 ft) width at the narrowest point. Both islands are home to Singaporean diving companies, divers reach the island by chartered boats from Mersing or Singapore.
Due to its distance from the mainland of Peninsula Malaysia, Aur Island offers clear water at its dive sites. Marine life commonly seen by divers include manta ray, barracudas, whitetip sharks, rays, napoleon wrasse, jacks, trevally, yellowback fusiliers, turtle, angelfish, titan triggerfish and bumphead parrotfish.