Paul-François Groussac (February 15, 1848 – June 27, 1929) was a French-born Argentine writer, literary critic, historian, and librarian.

Over the next seventeen years, he worked as a professor, directed the Escuela Normal de Tucumán, and served as inspector general of the national colleges.

His works, including Studies of Argentine History, Historical Essay on Tucumán, and Mendoza and Garay, are characterized by their factual richness, vivid depiction of characters and their environment, and their lucid and conscientious style.

Groussac's other main works include Forbidden Fruit, Argentine Tales, The Divisa Punzó, and Literary Criticism and the Malvinas Islands.

Groussac's posthumous reputation was bolstered by his frequent mention in the critical essays of fellow Argentine librarian Jorge Luis Borges, who also wrote his obituary.