Pierre Jannet (5 January 1820, Saint-Germain-de-Grave – November 1870, Paris) was a 19th-century French bibliophile and bibliographer.
A self-educated publisher, Jannet published with the assistance of Ternaux-Compans, the Bibliothèque elzévirienne, elegant collection of 16th-century French writers, of which he edited himself several volumes: l’Ancien Théâtre Français, les Facétieuses de Straparole, etc.
He wrote several collections of bibliographies.