Mount Kosciuszko is a mountain located on the Main Range of the Snowy Mountains in Kosciuszko National Park, part of the Australian Alps National Parks and Reserves, in New South Wales, Australia.arious measurements of the peak originally called Kosciuszko showed it to be slightly lower than its neighbour, Mount Townsend. The names of the mountains were swapped by the New South Wales Lands Department, so that Mount Kosciuszko remains the name of the highest peak of Australia, and Mount Townsend ranks as second.