The Château du Jonchet is a French Renaissance château located on the banks of the Aigre River in the former commune of Romilly-sur-Aigre (which merged into the new commune of Cloyes-les-Trois-Rivières in 2017) in the Eure-et-Loir department in the region of Centre-Val de Loire, in northern France. The château was built in the sixteenth century, before being completely transformed by the King's architect in the eighteenth century. The château was restored by Fernand Pouillon before it was owned by and Hubert de Givenchy, who owned the château until his death in 2018.