Gérard Lesne (born 15 July 1956) is a French countertenor. He is also the founder and artistic director of the baroque music ensemble, Il Seminario Musicale.

Gérard Lesne was born in Montmorency, Val-d'Oise. He was originally a rock singer, but in 1979 the tenor Zeger Vandersteene introduced him to René Clemencic, a pioneer of work in the medieval repertoire, and at age 23, Lesne began touring with the Clemencic Consort. Lesne has made more than 70 recordings and has appeared as a soloist at numerous opera houses and music festivals including the Opéra de Paris, Théâtre des Champs-Elysées, La Fenice, Opéra National de Lyon, Théâtre du Châtelet, Teatro San Carlo, Aix-en-Provence Festival, Utrecht Early Music Festival, and Boston Early Music Festival.