Katrina Matthews (born 13 March 1991, née Rye) is an English professional triathlete who races in non-drafting, long-distance events.

[5] She was a member of the BMC Pro triathlon team and is a physiotherapist currently serving in the British Army under their Elite Sports Programme.

[7][8] Early in the 2019 season, Matthews won Challenge Gran Canaria as an amateur thus securing her pro licence and, as a professional went on to podium at four middle distance events including winning the ETU European Championships.

[22] While acclimatizing in Texas for the 2022 Ironman World Championships in Kona, Hawaii, a driver drove into her resulting in very serious injuries.

[27] In 2023, recovered and rehabilitated,[28] Matthews returned to racing 'grateful' to finish third at IM 70.3 Oceanside behind Tamara Jewett and the current world champion Chelsea Sodaro.