The Chiltern Forest is a large expanse of woodland that covers part of the Chiltern Hills in south east England.

The area is forested mainly with beeches, though these are not indigenous to the local area. The native hard woods (for example oak) were almost completely deforested in the Eighteenth century for the furniture industry of High Wycombe. Beeches were planted as they are a hard wood that grows faster than any of the area's native woods.