What is the name of Australia's largest salt lake?

Australia’s largest salt lake is Lake Eyre, officially known as Kati Thanda–Lake Eyre.

The lake lies in the deserts of northern South Australia and is the terminal basin of a vast inland drainage system. Because it is endorheic, its rivers do not reach the sea. Floodwaters travel hundreds of kilometres through the Channel Country before entering the lake, where intense evaporation leaves behind a broad salt pan.

When completely full, Lake Eyre can cover about 9,500 square kilometres, making it Australia’s largest lake as well as its largest ephemeral salt lake. Complete filling is exceptionally rare; the lake is usually dry or divided into shallow sub-lakes. Its deepest point is approximately 15 metres below sea level, the lowest natural elevation in Australia.

The lake’s salinity changes dramatically. Fresh floodwater can support fish and attract enormous numbers of pelicans and other waterbirds, but evaporation progressively concentrates the salts until the remaining water becomes hypersaline. The English name honours explorer Edward John Eyre, who saw the lake in 1840; the dual name Kati Thanda–Lake Eyre was formally adopted in 2012.