Rachel Joyce (born 16 June 1978) is an English professional triathlete. She is the winner of the 2011 ITU Long Distance Triathlon World Championships and the second-place finisher at the 2013 Ironman World Championship and 2015 Ironman World Championship. She races in primarily long-distance triathlon events, such as Ironman and Ironman 70.3 distances, and has won events such as Ironman Mont Tremblant in 2017 and Challenge Roth in 2012.