The Nemours Estate is a 200-acre (81 ha) country estate with jardin à la française formal gardens and a French neoclassical mansion in Wilmington, Delaware, United States. Built to resemble a French château, its 105 rooms on four floors occupy nearly 47,000 sq ft (4,400 m2). It shares the grounds at 1600 Rockland Road with the Nemours Children's Hospital, Delaware, and both are owned by the Nemours Foundation.

The French formal garden, also called the jardin à la française, is a style of "landscape" garden based on symmetry and the principle of imposing order on nature. Its epitome is generally considered to be the Gardens of Versailles designed during the 17th century by the landscape architect André Le Nôtre for Louis XIV and widely copied by other European courts.