Julien Gracq (27 July 1910 – 22 December 2007), born Louis Poirier in St.-Florent-le-Vieil, in the French "département" of Maine-et-Loire, was a French writer. He wrote novels, critiques, a play, and poetry. His literary works were noted for their Surrealism.

Gracq first studied in Paris at the Lycée Henri IV, where he earned his baccalauréat. He then entered the École Normale Supérieure in 1930, later studying at the École libre des sciences politiques.

In 1932, he read André Breton's Nadja, which deeply influenced him. His first novel, The Castle of Argol is dedicated to that surrealist writer, to whom he devoted a whole book in 1948.