Fourmies is a commune in the Nord department in northern France. The inhabitants are called Fourmisiens. It lies on the river Helpe Mineure (Helpe Minor or Little Helpe). Since 2015, Fourmies has been the seat of the Canton of Fourmies, an administrative division of the Nord department. The canton was created at the French canton reorganization which came into effect in March 2015.
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