No, the Tasmanian devil (Sarcophilus harrisii) is not found on mainland Australia. It is endemic to the island state of Tasmania, where it is the largest surviving carnivorous marsupial.
Fossil evidence shows that Tasmanian devils once lived on the mainland, but they disappeared there around 3,000 years ago, likely due to competition with dingoes and human impacts. Today, they survive only in Tasmania.
The species is endangered, primarily due to Devil Facial Tumour Disease (DFTD), a contagious cancer. Conservation efforts focus on insurance populations and disease management.