Tómas Lemarquis (born August 3, 1977) is a French–Icelandic actor.

Lemarquis was born in Reykjavík, the son of an Icelandic mother and a French father, Gérard Lemarquis, who is a schoolteacher. His most distinguishing physical feature—a complete lack of hair of any kind—is the result of alopecia universalis, which made him completely hairless by the age of 14. He grew up between Iceland and France, and studied theater at the Cours Florent in Paris, where he was a classmate of actress Audrey Tautou. He also attended the Reykjavík School of Fine Arts in Iceland.