Tamsin Cook

Tamsin Cook was born in Cape Town on 25 December 1998. She moved to Perth, Australia when she was 8. Tamsin swims with the University of Western Australia Swimming Club.

Cook participated in the 2014 Junior Pan Pacific Swimming Championships in Maui, Hawaii. She won the gold medal in the 400-meter freestyle at the 2015 FINA World Junior Swimming Championships in Singapore in a new Championships record. She also broke the Championships record in the 200-meter freestyle with her lead-off leg in the 4 × 200 m freestyle relay final. In that race, she and her teammates broke the junior world record. Cook also won a silver medal in the 200-meter butterfly

After a neck injury in 2018, she retired from swimming, but returned in 2020 and qualified for the 2020 Summer Olympics in Tokyo, winning silver (2016) and bronze medals (2020) with the Australian 4x200 freestyle relay teams.