Petria Ann Thomas, OAM (born 25 August 1975) is an Australian swimmer and Olympic gold medallist and a winner of 15 national titles.

While being one of the pinnacles of her career, her victory also made her the first female swimmer ever to win the same event at three consecutive Commonwealth Games – the 100-metre butterfly.

[citation needed] In 2004, Thomas made another comeback at the Olympic selection trials in Sydney while training with the Ginninderra Swimming Club.

[citation needed] In mid-2005, Thomas released an autobiography, Swimming Against The Tide, in which she describes her career, including her experiences with depression and injuries.

[citation needed] She currently resides in Amaroo, Canberra, with her husband, Julian Jones, the head strength and conditioning coach at the AIS.

[citation needed] She served as Chef de Mission of the Australian team at the 2022 Commonwealth Games held in Birmingham, England.