François d'Agincourt (also d'Agincour, Dagincourt, Dagincour) (1684 – 30 April 1758) was a French harpsichordist, organist, and composer.

Jacques Duphly studied with d'Agincourt about 1730–31, but his surviving works do not show any considerable influence of his teacher's style.

D'Agincourt only published a single collection of his music, 1er livre de clavecin (Paris, 1733).

D'Agincourt's organ music, which survives in a manuscript copy made by the renegade French priest and scientist Alexandre Guy Pingré.

Apart from keyboard pieces, only three songs for soloist and basso continuo are known, published in the anthology Recueil d'airs sérieux et à boire in 1713 and 1716.