Isles-lès-Villenoy is a commune in the Seine-et-Marne department in the Île-de-France region in north-central France. Inhabitants are called In…Isles-lès-Villenoy is a commune in the Seine-et-Marne department in the Île-de-France region in north-central France. Inhabitants are called Insuvilais. Isles-lès-Villenoy has existed at least since the Merovingian period, and according to legend, Charles the Simple had a castle there. The village became significant when a toll bridge over the river Marne was built in 1839. At that point, the town became a holiday destination. In 1924, Isles-lès-Villenoy was attached to the canton of Meaux.