Xavier Siméon (born 31 August 1989) is a Grand Prix motorcycle racer from Belgium, competing in the MotoE World Cup.

He is the winner of the 2009 FIM Superstock 1000 Championship and the 2006 European Superstock 600 Championship and the winner of the 2021 24 Hours Moto of Le Mans endurance race on Suzuki together with Sylvain Guintoli and Gregg Black.

[1] At the 2013 French Grand Prix, Siméon became the first Belgian rider since Didier de Radiguès in 1990 to take a podium finish, when he finished third behind Marc VDS Racing Team riders Scott Redding and Mika Kallio.

Later in the season, Siméon took pole position for the German Grand Prix, the first such result for a Belgian since de Radiguès in 1989.

[3] In doing so, he became only the third Belgian rider to win a motorcycle Grand Prix, after de Radiguès and Julien Vanzeebroeck.