Which of these is officially recognised as Australia's national animal?

Australia does not have a single legally declared “national animal,” but the kangaroo (specifically the red kangaroo) is widely accepted as the national animal symbol because it appears on the Australian coat of arms, is endemic, and represents the country globally.

Explanation

When people search “Australia national animal,” the most consistent result is the kangaroo. Strictly speaking, Australia has not passed a national law naming one official animal in the way it has a national floral emblem (golden wattle). 

However, in national symbolism and international branding, the kangaroo fills that role. It is the most recognised Australian mammal, featured on government insignia, the Royal Australian Mint’s $1 coin design (multiple kangaroos), airline and tourism logos, sporting uniforms, and countless national campaigns. In encyclopedias and classrooms, you will commonly see the red kangaroo referenced as the national animal because it is the largest kangaroo, endemic, and iconic across Australia’s arid and semi-arid interior.

Why the perception of “official” status exists

• Coat of arms presence: The kangaroo stands as a supporter on the Australian coat of arms alongside the emu, a position normally reserved for core national symbols.
• Endemic and emblematic: The kangaroo evolved in Australia and is strongly tied to national identity, culture, and ecology.
• Widespread state and federal usage: Government agencies and national brands repeatedly use the kangaroo as a visual shorthand for Australia.