The Château du duc d'Épernon is a château, built on the site of a medieval castle located in Fontenay-Trésigny, in the Brie region of France, 43 km southeast of Paris. It stands alongside the Bréon stream and next to the Church of Saint-Martin, in the heart of a once walled old town, the history of which is closely linked to the history of the château. The castellans were lords of Fontenay-en-Brie during the Old Regime.
The château has been classified as a Monument historique since 7 October 1963, and its park land is included in the List of Remarkable Gardens of France published by the French Ministry of Culture.
Address (Unnamed Road), Fontenay-Trésigny 77610, France
Coordinates 48°42'21.815" N 2°51'43.078" E