Simon Gerrans (born 16 May 1980) is an Australian former professional road bicycle racer, who rode professionally between 2005 and 2018, for the AG2R Prévoyance, Crédit Agricole, Cervélo TestTeam, Team Sky, Orica–Scott and BMC Racing Team squads. Post-retirement he initially worked as an athlete intern at Goldman Sachs in London, then joined The Service Course, in which he is an investor, as COO and now CEO, in early 2020. He can also be heard commentating road cycling for ASO and SBS.

Gerrans was a two-time winner of the Australian National Road Race Championships, having won the title in 2012, and 2014. Aside from his National Championship successes, his biggest triumphs were winning the Tour Down Under a record four times, and getting the better of one-day races such as the 2009 GP Ouest-France, the 2012 Milan–San Remo, the 2012 and 2014 Grand Prix Cycliste de Québec, the 2014 Liège–Bastogne–Liège, and stage wins in all three Grand Tours. In the 2013 Tour de France, Gerrans claimed the yellow jersey on Stage 4 after being part of the winning team in the Stage 4 team time trial in Nice.