Anglo-Celtic Australians is an ancestral grouping of Australians whose ancestors originate wholly or partially in the British Isles - predominantly in England, Ireland, Scotland and Wales. While Anglo-Celtic Australians do not form an official ethnic grouping in the Australian Bureau of Statistics' Australian Standard Classification of Cultural and Ethnic Groups, due to the long historical dominance and intermixture of Australians with ancestries from the British Isles, it is commonly used as an informal ethnic identifier.