Ngiyambaa is a member of the Wiradhuric subgroup of the Pama-Nyungan language family. It was originally spoken by the Wailwan and Wiraibon, East Australian tribes in the geographical centre of New South Wales between the Sandy Creek near Cobar to the north and the Willandra Creek near Ivanhoe to the south. Now Ngiyampaa speakers live in various places aroundd south-eastern Australia.
The language is only spoken by a handful of people, perhaps 10, and is used mainly for traditional and cultural purposes. There are two variants of the language: Wailwan (Wayilwan) and Wiraibon (Wangaaypuwan).