The Supreme Court of South Australia is the superior court of the Australian state of South Australia. The Supreme Court is the highest South Australian court in the Australian court hierarchy. It has unlimited jurisdiction within the state in civil matters, and hears the most serious criminal matters. The Court is composed of a Chief Justice and as many other judges as may be required.

The judiciary of Australia comprises judges who sit in federal courts and courts of the States and Territories of Australia. The High Court of Australia sits at the apex of the Australian court hierarchy as the ultimate court of appeal on matters of both federal and State law.