Katja Dedekind (born 17 August 2001) is an Australian Paralympic vision-impaired swimmer and goalball player.

[5] Previously from Kenmore, Brisbane,[5] Dedekind now lives on the Sunshine Coast having graduated from Matthew Flinders Anglican College, Buderim, in 2019.

[6][7] In March 2018, Dedekind had the honour of being a Queen's Baton Relay runner as one of 3500 Australians for the XXI Commonwealth Games.

[5] Dedekind was awarded a Sporting Full Blue at Grffith University whilst studying a Bachelor of Communications.

[14] In August 2018 at the Pan Pacific Para Swimming Championships in Cairns, Queensland, just before her seventeenth birthday, Dedekind took gold with her fastest competitive time for the 100 m backstroke.

[21] At the 2022 Commonwealth Games in Birmingham, Dedekind won the gold medal in Women's 50 m freestyle S13 in a world record time.

[24] At the 2024 Summer Paralympics in Paris, France, she swam in the Women's 50 m freestyle S13 but did not qualify for the final.