Stephanie Au

Stephanie Au Hoi-shun (; born 30 May 1992) is a Hong Kong competitive swimmer. She is a four-time Olympian, having represented Hong Kong at the 2008, 2012, 2016 and 2020 Summer Olympics. She also represented Hong Kong in five editions of FINA World Aquatics Championships (2013, 2015, 2019, 2022, 2023) and FINA World Swimming Championships (25 m) (2008, 2014, 2018, 2021, 2022) respectively.

Au is the holder of 18 Hong Kong national records, plus former record holder in 8 other events. Currently she holds long course records in the 800 m freestyle, 50m, 100m backstroke, short course records in 800 m and 1500 m freestyle, 50m, 100, 200m backstroke, together with all long course and short course women's relay records (4×100 m medley, 4×100 m freestyle and 4×200 m freestyle relay).

She studied at Sacred Heart Canossian College., and swam for the University of California, Berkeley, from which she graduated with a degree in environmental economics and policy in 2014. She is also a winner of the 24th Hong Kong Outstanding Students Awards.

She represented Hong Kong at the 2020 Summer Olympics held in Tokyo, Japan.