The Vale of Wardour encompasses the valley of the River Nadder in the county of Wiltshire, England.

[1] The Vale of Wardour lies east of the town of Shaftesbury and is a relatively small but varied landscape.

Named after the village of Wardour, its main river is the Nadder which flows from west to east through the vale.

The area extends west almost as far as Barford St Martin, where the Nadder valley narrows.

The Nadder flows through a clay valley surrounded by hills of Purbeck, Portland, and Lower and Upper Greensand.The Gault, thickness up to 27.5 m (90 ft.), is also present in the Vale, notable are the numerous phosphatic nodules it contains.