These are the longest rivers in Oceania. In fact, all of them are in Australia.
The Murray–Darling–Culgoa–Balonne–Condamine river system tops the list at 3,672km. The Murrumbidgee River stands second at 1,485km, flowing through the Australian state of New South Wales and the Australian Capital Territory. The Cooper–Barcoo River of western Queensland, Australia follows with a distance of 1,420km.