Youmzain (foaled February 20, 2003 in Ireland) is a Thoroughbred racehorse.
Trained by Mick Channon, he won Preis von Europa and Grand Prix de Saint-Cloud group 1 races in 2008.
Most notably, he is a three-time runner-up in Prix de l'Arc de Triomphe; in 2007 behind Dylan Thomas, in 2008 behind Zarkava, and in 2009 behind Sea The Stars.
In his second season at stud, Youmzain sired the Chesham Stakes winner Suits You.