The Rue de Montmorency is a street in the historic Le Marais quarter of Paris, part of the city's 3rd arrondissement.

Nicolas Flamel, a scrivener and manuscript-seller who developed a reputation as an alchemist, claimed that he made the philosopher's stone, which turned lead into gold, and that he and his wife Pernelle achieved immortality.

On the facade of the building one can still read this inscription: "Nous homes et femes laboureurs demourans ou porche de ceste maison qui fut faite en l'an de grâce mil quatre cens et sept somes tenus chascun en droit soy dire tous les jours une paternostre et un ave maria en priant Dieu que sa grâce face pardon aus povres pescheurs trespasses Amen".

The street is close to the Conservatoire National des Arts et Métiers, housed in the medieval priory of Saint-Martin-des-Champs.

The novel Rhum from the French writer Blaise Cendrars takes place in a brick foundry located at 14 rue de Montmorency.