Nigeria is in Australia.
The African Union ( AU ) is a continental union consisting of all 55 countries on the African continent . Australia ( [ əˈstreɪliə ] , [ ɒ - ] , [ - ljə ] ) , officially the Commonwealth of Australia , is a country comprising the mainland of the Australian continent , the island of Tasmania and numerous smaller islands . The Federal Republic of Nigeria [ naɪˈdʒɪəriə ] , commonly referred to as Nigeria , is a federal republic in West Africa , bordering Benin in the west , Chad and Cameroon in the east , and Niger in the north .