Coulommiers is a commune in the Seine-et-Marne department in the Île-de-France in north-central France. It is also the name of a cheese of t…Coulommiers is a commune in the Seine-et-Marne department in the Île-de-France in north-central France. It is also the name of a cheese of the Brie family produced around that city. Coulommiers station has rail connections to Tournan-en-Brie and Paris.