Arrondissement of Épernay
The arrondissement of Épernay is in the southwest of the Marne department. It is bordered to the north by the arrondissement of Reims, to the east by the Châlons-en-Champagne arrondissement, to the southeast and south by the Aube department, to the southwest by the Seine-et-Marne department and to the west by the Aisne department.