Arrondissement of Châlons-en-Champagne

The arrondissement of Châlons-en-Champagne is an arrondissement of France, in the Marne department, Grand Est region. Its capital, and prefecture of the department, is the city of Châlons-en-Champagne.
History.
When the Marne department was created on 1800, the "arrondissement" of Châlons-en-Champagne, with the name Châlons-sur-Marne, was part of that original department.
Geography.
The "arrondissement" of Châlons-en-Champagne is the central "arrondissements" of the Marne department. It is bordered to the north by the "arrondissement" of Reims and, for a short distance, by the Ardennes department; to the northeast by the Sainte-Menehould "arrondissement"; to the southeast and south by the Vitry-le-François "arrondissement"; and to the west by the Épernay "arrondissement".
The "arrondissement" of Châlons-en-Champagne is the second largest "arrondissement" of the department in area, , and the third in population (103,110 inhabitants) with a population density of inhabitants/km².
Composition.
Cantons.
After the reorganisation of the cantons in France, cantons are not subdivisions of the "arrondissements" so they could have "communes" that belong to different "arrondissements".
In the "arrondissement" of Châlons-en-Champagne, there are six cantons and three of them do not have all their "communes" in the "arrondissement":
Communes.
The "arrondissement" of Châlons-en-Champagne has 100 "communes"; they are (with their INSEE codes)ː
The "communes" in the "arrondissement" with more inhabitants are: