Indian Australians or Indo-Australians are Australians of Indian ancestry. This includes both those who are Australian by birth, and those born in India or elsewhere in the Indian diaspora. Indian Australians are one of the largest groups within the Indian diaspora, with 783,958 persons declaring Indian ancestry at the 2021 census, representing 3.1% of the Australian population. In 2019, the Australian Bureau of Statistics estimated that 721,050 Australian residents were born in India.

Australians, colloquially known as Aussies, are the citizens, nationals and individuals associated with the country of Australia. This connection may be residential, legal, historical or ethno-cultural. For most Australians, several of these connections exist and are collectively the source of their being Australian. Australian law does not provide for a racial or ethnic component of nationality, instead relying on citizenship as a legal status.