The canton of Châlons-en-Champagne-1 is an administrative division of the Marne department, in northeastern France. Its borders were modified during the French canton reorganisation which came into effect in March 2015. Its seat is in Châlons-en-Champagne.
It consists of the following communes: Châlons-en-Champagne (partly) Compertrix Coolus Fagnières
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