Sir Garfield Edward John Barwick was an Australian judge who was the seventh and longest serving Chief Justice of Australia, in office from 1964 to 1981. He had earlier been a Liberal Party politician, serving as a minister in the Menzies government from 1958 to 1964.

The chief justice of Australia is the presiding justice of the High Court of Australia and the highest-ranking judicial officer in the Commonwealth of Australia. The incumbent is Stephen Gageler, since 6 November 2023.