Trevor John Riley AO KC (born 29 January 1948) was the Chief Justice of the Supreme Court of the Northern Territory in Australia. He was appointed a judge of the Supreme Court on 1 February 1999, Chief Justice on 27 September 2010 and retired on 4 July 2016. Justice Riley was born in Bruce Rock in Western Australia and was educated at the Merredin Senior High School and the University of Western Australia. On 22 July 2010 it was announced that Justice Riley would become the Northern Territory's sixth Chief Justice after the retirement of Brian Ross Martin. Justice Riley retired in 2016.