Sylvain is the French form of Silvanus. It may refer to:
Sylvain Cappell, American mathematician
Sylvain Chavanel, French cyclist
Sylvain Chomet, French animator
Sylvain Cossette, Canadian pop vocalist
Sylvain Côté, Canadian former ice hockey player
Sylvain Cros, French freestyle swimmer
Sylvain Dufresne (born 1978), Canadian ice hockey defenceman
Sylvain Garel, French politician and human-rights activist
Sylvain Grenier, Canadian wrestler
Sylvain Julien Victor Arend, Belgian astronomer
Sylvain Lefebvre, former NHL player
Sylvain Légaré, Canadian politician
Sylvain Maréchal, French essayist
Sylvain Remy, Beninese footballer
Sylvain Sylvain, guitarist
Sylvain Turgeon, Canadian former NHL player
Sylvain Wiltord, French footballer