Leonard William Roberts-Smith, (born 25 October 1946) is a former Justice of the Supreme Court of Western Australia, which is the highest ranking court in the Australian State of Western Australia (WA).
From February 2005, he was one of the inaugural Judges of the Court of Appeal Division, having been first appointed to the Supreme Court on 6 November 2000.
From May 2007 he served as Commissioner of the Corruption and Crime Commission of Western Australia, having been appointed for a five-year term.