Danesfield House in Medmenham, near Marlow, Buckinghamshire, England, in the Chiltern Hills is a former country house now used as a hotel and spa. The house stands on a plateau which shelves steeply down to the River Thames to the south.
The house is located on the site of a large multivallate hillfort known as Danesfield Camp, which originally had ramparts to north, east and west. Chalk cliffs to the south form a roughly rectangular plateau. Antiquarian Thomas Langley reported in 1797 that the site was a Danish encampment (hence "Danes-field"), but that interpretation was challenged by later finds of artefacts from the Neolithic, Bronze and Iron Ages. Medmenham Camp, a slight univallate hillfort, lies about 1 km to the west. Both are scheduled ancient monuments.
The estate was acquired by Edmund Medlycott in 1664. He and his family occupied a farmhouse here, known as Medlycotts. The house was rented to Mrs Morton in 1725. Her son, John Morton, was a barrister and became Attorney-General to Queen Charlotte and Chief Justice of Chester (1762–1780). He also sat as Member of Parliament for Abingdon (1747–1770), New Romney (1770–1774) and Wigan (1775–1780). He acquired the estate's freehold in 1750, and later added extra land. He also bought the ruins of nearby Medmenham Abbey in 1778. He had the existing house demolished and built a new one which he named Danesfield. This house stood to the north of the prehistoric ramparts.