Constituencies of France explained

Constituencies (French: circonscriptions) or electoral districts are used for various elections in France.

Assembly	Constituencies
	For residents of Metropolitan France, each department is split into numbered constituencies For residents of Overseas France, similar is true except the overseas collectivities of Saint Martin and Saint Barthélemy share a single constituency French people living outside France vote in one of eleven constituencies, each of which groups neighbouring foreign countries.
Senate	French Senate elections are indirect; each department is a constituency, with all its elected local representatives forming an electoral college to vote for its Senators.
European Parliament	France forms a single constituency with an at-large election. From 2004 to 2019 there were eight geographic constituencies
Departmental council	Each canton of the department is a constituency