|Birth name||William Houston|
|Date of birth||25 May 1988|
|Place of birth||Australia|
|Rugby union career|
Houston took up rugby refereeing as a high school student at Shore in Sydney, and continued refereeing at senior club level while studying law at the University of New South Wales. After graduating in 2011, he was a first grade referee in the Shute Shield competition, including an appointment as an assistant referee for the 2012 grand final. Houston officiated in Super Rugby as an assistant referee in 2012.
In 2013, he went to the Sanix World Youth Tournament in Japan, where he refereed the final between Saint Kentigern and Hartpury College. Houston also officiated at the Darwin Hottest Sevens tournament. He refereed the final of the inaugural World Club 10s in Singapore in 2014, where the Auckland Blues defeated the ACT Brumbies after double extra time to win the title.
For Australia's National Rugby Championship, Houston was appointed to semi-final matches in 2014, 2015 and 2016 and was appointed to the final in 2017. He refereed the final of the 2015 World Rugby U20s and later that year refereed in New Zealand's ITM Cup. He was in charge of the Shute Shield grand finals in 2015 and 2016. Houston joined the Super Rugby referees panel in 2016. His debut match was on 19 March 2016 in Christchurch, with the Crusaders playing the Southern Kings.