The "arrondissement" of Laon is the central "arrondissement" of the Aisne department. It is bordered to the northwest by the Saint-Quentin "arrondissement", to the northeast by the Vervins "arrondissement", to the east by the Ardennes department, to the southeast by the Marne department, to the south by the Soissons "arrondissement", to the southwest by the Oise department and to the northwest by the Somme department.