Don Quichotte chez la Duchesse (Don Quixote at the Duchess) is a "comic ballet" (comédie lyrique) by the French baroque composer Joseph Bodin de Boismortier. Although it is described as a ballet, it is sung throughout with a libretto by Charles Simon Favart.
It was first performed on 12 February 1743 at the Académie Royale de Musique et de Dance in Paris.
The opera is based upon an episode in the Cervantes novel Don Quixote, in which a Duke and Duchess amuse themselves by creating an elaborate ruse to fool the title character.