European Australians are citizens or residents of Australia whose ancestry originates from the peoples of Europe. They form the largest panethnic group in the country. At the 2021 census, the number of ancestry responses categorised within European ancestral groups as a proportion of the total population amounted to more than 57.2%. It is impossible to quantify the precise proportion of the population with European ancestry. For instance, many census recipients nominated two European ancestries, tending towards an overcount. Conversely, 29.9% of census recipients nominated "Australian" ancestry, tending towards an undercount.

Irish Australians are an ethnic group of Australian citizens of Irish descent, which include immigrants from and descendants whose ancestry originates from the island of Ireland.