Izaac Keith Stubblety-Cook OAM[2] (/ˈstʌblɛti-/ STUB-let-ee-;[3] born 4 January 1999) is an Australian swimmer.

[6] He swam the breaststroke leg in the mixed 4x100m relay in which Australia finished 3rd, winning a bronze medal.

[7] He trains under Vince Raleigh at the Chandler Aquatic Centre, Brisbane, Queensland.

[8] His reason for joining was to participate in the swim program for general water safety.

[11] At the 2022 Australian Swimming Championships, held in May in Adelaide, he qualified for the 2022 World Aquatics Championships and 2022 Commonwealth Games in the 100 metre breaststroke and 200 metre breaststroke, setting a new world record in the 200 metre breaststroke in the final with a time of 2:05.95 to break the former record of 2:06.12 set by Anton Chupkov of Russia in 2019.