The Lake Eyre basin ( ) is a drainage basin that covers just under one-sixth of all Australia. It is the largest endorheic basin in Australia and amongst the largest in the world, covering about , including much of inland Queensland, large portions of South Australia and the Northern Territory, and a part of western New South Wales. The basin is also one of the largest, least-developed arid zone basins with a high degree of variability anywhere. It supports about 60,000 people and a large amount of wildlife, and has no major irrigation, diversions or flood-plain developments. Low density grazing is the major land use, occupying 82% of the total land within the basin.