Arpajon ( ) is a commune in the Essonne department in the Île-de-France region of northern France.

Anne d'Arpajon, comtesse de Noailles was a French noblewoman and court official. She served as the dame d'honneur of two Queens of France, Marie Leszczyńska and Marie Antoinette. She was called "Madame Etiquette" by Marie Antoinette for her insistence that the minutiae of court etiquette could never be altered or disregarded.