Lagny is the name or part of the name of three communes of France:
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Lagny, Oise in the Oise ''département''
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Lagny-le-Sec in the Oise ''département''
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Lagny-sur-Marne
Lagny-sur-Marne (, literally ''Lagny on Marne'') is a commune in the eastern suburbs of Paris, France. It is located in the Seine-et-Marne department in Île-de-France from the centre of Paris (20 minutes away from the centre of Paris).
The ...
in the Seine-et-Marne ''département''
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