Kirsten Thomson (born 27 September 1983) is an Australian middle-distance freestyle swimmer who won a silver medal in the 4×200-metre freestyle relay at the 2000 Summer Olympics.

[1] Coming from Sydney, New South Wales, Thomson was still attending Kirrawee High School, when under the tutelage of Doug Frost at the Sutherland club alongside Ian Thorpe when she was selected as a member of Australia's 4×200-metre relay team for the Sydney Games.

Combining with Susie O'Neill, Giaan Rooney and Petria Thomas, the Australians led for the first 650 metres before being worn down by the U.S. relay team.

In 2003 Thomson, swimming with the University of Sydney club returned to the international arena, competing at the 2003 FINA World Championships in Barcelona, Spain, where she collected a silver in the 4×200-metre freestyle relay,[2] and failed to make the final of the individual event.

In February 2005 Thomson appeared in Series 10, episode 2 of Australian Story.