Haddington Hill (also called Wendover Hill) is a hill in The Chilterns, and the highest point in the English county of Buckinghamshire. On the north-eastern flank is Coombe Hill, not to be confused with another Coombe Hill 4 kilometres (2.5 mi) to the south-west.

Haddington Hill is owned by the Forestry Commission, whose Wendover Woods cover much of the hill. Many tracks run through the forest, and a car park is located near the summit among the trees: the flat summit means the precise location of the highest point is difficult to determine with certainty. However, in the woods to the east of the car park there are a series of large stones bearing the inscription 'The Chiltern Summit'. The stones are surrounded by trees.

The peak is accessible by road, with a car park near the stone. It is also possible to climb on foot.

Pavis Wood, the highest point of Hertfordshire, at 244 m (801 ft), is on the eastern ridge of this hill, on the boundary with Buckinghamshire.

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