Australia, officially the Commonwealth of Australia, is a vast and diverse nation comprising the mainland of the Australian continent, the island of Tasmania, and numerous smaller islands. Covering approximately 7.69 million square kilometers, it ranks as the sixth-largest country in the world and the largest in Oceania. Known for its breathtaking natural beauty, Australia is recognized as the world’s flattest and driest inhabited continent, yet boasts an extraordinary range of environments — from sweeping deserts and lush tropical rainforests to vibrant coastal cities.

The nation’s capital is Canberra, while Sydney and Melbourne are its largest metropolitan hubs, serving as global centers of commerce, culture, and education. English is the national language, and Australia is home to a multicultural society where over 25 million people reside, representing a blend of indigenous heritage and global migration.

Governed as a federal parliamentary constitutional monarchy, Australia’s head of state is King Charles III, represented locally by Governor-General Sam Mostyn, with Prime Minister Anthony Albanese leading the government. The Parliament of Australia consists of the Senate and the House of Representatives, reflecting the nation’s democratic framework.

Since achieving federation in 1901 and later legislative independence from the United Kingdom through acts finalized in 1986, Australia has evolved into one of the most stable and prosperous democracies globally. With a 2025 population estimate of over 28 million and a GDP exceeding $1.9 trillion, it ranks among the world’s top 20 economies.

Australia is also renowned for its rich biodiversity, being one of the few megadiverse countries on Earth. Its landscapes host unique flora and fauna, including kangaroos, koalas, and countless species found nowhere else. The nation’s commitment to sustainability and its dynamic economy make it a leading player in global environmental, economic, and cultural affairs.