Major General Leonard William Roberts-Smith, RFD, KC (born 25 October 1946)[1] is a former Justice of the Supreme Court of Western Australia.

From May 2007, he served as Commissioner of the Corruption and Crime Commission of Western Australia, having been appointed for a five-year term.

In 1978, he was appointed the foundation director of the Legal Aid Commission of Western Australia and held this position for 11 years.

He chaired the State Government Committee of Review into the Administration of Criminal Justice in Queensland in 1993, which reported in September that year.

[2] Roberts-Smith has been an accredited Australian Advocacy Institute teacher since 1992 and was a member of the Legal Practice Board of WA between 1989 and 2000.

When he moved to Port Moresby in 1970, Roberts-Smith transferred to the Australian Army Legal Corps as a reservist with the rank of captain.