Ailly may refer to the following places in France:

Ailly, Eure, Normandy Ailly-le-Haut-Clocher, Somme, Hauts-de-France Ailly-sur-Noye, Somme, Hauts-de-France Ailly-sur-Somme, Somme, Hauts-de-France

See also d'Ailly, a surname Aillyidae, a family of snails