Australia is a nation-state and continent in the Southern Hemisphere on Earth. The city of Canberra was the national capital. People from Australia are known as Australians but are affectionately nick-named Aussies or Ozzies. One group of indigenous Australians were referred to as Australian Aborigines.
The Starfleet Search and Rescue Emergency Medical Technician and Specialist courses were held at a large installation on the outskirts of the town of Bindoon in the Outback. (Star Trek: Voyager - Dark Realm)
The human inhabitants of the Sagara IV colony were drawn from Australia and Japan. Warragul Wirrpanda's mother was an ethnic Pintupi from Murray Bridge; his father was from Perth. (Bait and Switch: "Shakedown Shenanigans", "Last Rights")
- There was an Australia class of battlecruisers built during the mid-23rd century, many of which saw combat during the Four Years War. (Star Fleet Battles and extrapolations by Alex Rosenzweig)
- USS Australia (NCC-1752)