Magali Rousseau (born 10 March 1988) is a French swimmer, who specialized in butterfly events.

[2] She represented her nation France in the 200 m butterfly at the 2008 Summer Olympics, and has been a member of Canet 66 in Canet-en-Roussillon throughout her swimming career under the tutelage of her coach Philippe Lucas.

[3][4] Rousseau competed as a lone French swimmer in the women's 200 m butterfly at the 2008 Summer Olympics in Beijing.

Leading up to the Games, she topped the field with a personal best of 2:10.07 to eclipse both the nation's own Olympic standard and the FINA A-cut (2:10.84) at the French Championships in Dunkirk.

[5] Swimming on the far outside in heat three, Rousseau chased the rest of the swimmers throughout the race to round out the field with a seventh-place time in 2:13.12.