John Leslie Toohey, AC, QC (4 March 1930 – 9 April 2015) was an Australian judge who was a Justice of the High Court of Australia from 1987 to 1998.

Toohey soon rose to prominence in the Western Australian legal profession, developing expertise in taxation and property law.

At the age of 31, he appeared before the High Court in Federal Commissioner of Taxation v Finn,[1] which concerned the deductibility of travelling expenses.

In 1972, he appeared in the High Court in Adamson v Hayes,[2] an important case concerning the construction of section 34 of the Property Law Act 1969 (WA).

[3] The Commission's report vindicated the Aboriginal people's version of events and found that police were unable to justify the arrests.

In his role as Commissioner, Toohey heard claims under the Aboriginal Land Rights (Northern Territory) Act 1976 (Cth).

In September 2000 he was appointed to be one of the three independent members of the Bloody Sunday Inquiry (chaired by Lord Saville) into the events of 30 January 1972 in Derry, Northern Ireland (replacing New Zealander Sir Edward Somers QC, who retired for personal reasons).