Home Education Geography Australia EducationGeography Australia Australia officially the Commonwealth of Australia, is a country comprising the mainland of the Australian continent, the island of Tasmania and numerous smaller islands. It is the world's sixth-largest country by total area. By Watch and Study - Jun 24, 2017 981 RELATED ARTICLESMORE FROM AUTHOR Geography What is Azerbaijan? Geography What is Armenia? Geography What is Argentina? Geography What is Antigua and Barbuda? Geography What is Angola? Tell us what you think!