Law Society of WA

Vale: Sir Anthony Mason

March 18, 2026

Sir Anthony Mason, one of Australia’s most influential jurists and a central figure in shaping modern constitutional law, has died aged 100.

Sir Anthony served on the High Court of Australia for more than two decades, including as Chief Justice from 1987 to 1995. His tenure is widely regarded as transformative, with the court expanding its role in constitutional interpretation and individual rights.

Appointed to the High Court in 1972 after a period on the Supreme Court of New South Wales, Sir Anthony later became the nation’s ninth Chief Justice. His judicial leadership coincided with a period of significant legal development, particularly in constitutional and administrative law.

He played a key role in a number of landmark decisions that reshaped Australian law. Most notably, the High Court’s ruling in Mabo v Queensland (No 2) rejected the doctrine of terra nullius and recognised the native title rights of Aboriginal and Torres Strait Islander peoples.

The Mason Court era is also associated with major developments in implied constitutional freedoms and procedural fairness, helping to redefine the relationship between citizens and the state.

Born in Sydney in 1925, Sir Anthony served in the Royal Australian Air Force during the Second World War before studying arts and law at the University of Sydney. He was admitted to the bar in 1951 and went on to become Commonwealth Solicitor-General in 1964, playing a significant role in the evolution of Australia’s administrative law framework.

After retiring from the High Court in 1995, he continued to contribute to the law internationally, including as a non-permanent judge of Hong Kong’s Court of Final Appeal, where he helped establish its early jurisprudence following the 1997 handover.

Sir Anthony’s career was not without controversy, including his involvement in events surrounding the 1975 dismissal of the Whitlam government. However, he is broadly remembered as a jurist of exceptional intellect whose decisions left a lasting imprint on Australian public law.

His legacy endures in the body of case law that continues to influence courts, practitioners and scholars across Australia and the wider common law world.

Image reproduced courtesy of LSJ under the Creative Commons License.

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