Laon Cathedral is a Roman Catholic church located in Laon, Aisne, Hauts-de-France, France. Built in the twelfth and thirteenth centuries, it is one of the most important and stylistically unified examples of early Gothic architecture. The church served as the cathedral of the Diocese of Laon until 1802, and has been recognized as a monument historique since 1840.

Laon is a city in the Aisne department in Hauts-de-France in northern France.