Clumber Park is a country park in The Dukeries near Worksop in Nottinghamshire, England. The estate, which was the seat of the Pelham-Clintons, Dukes of Newcastle, was purchased by the National Trust in 1946. It is listed Grade I on the Register of Historic Parks and Gardens.
The main house was demolished in 1938 after damage by a series of fires. The nearby Grade I listed chapel in Gothic Revival style and a four-acre walled kitchen garden still survive. The gardens and the estate are managed by the National Trust and are open to the public all year round.
Clumber, mentioned in the Domesday Book was a monastic property in the Middle Ages, but later came into the hands of the Holles family. In 1709 it was enclosed as a deer park by John Holles - 4th Earl of Clare, 3rd Earl of Newcastle upon Tyne and 1st Duke of Newcastle. Clumber house, close to the River Poulter at the centre of the park, became a hunting lodge.