Coordinates: 51°10′34″N 2°05′24″W / 51.176°N 2.090°W / 51.176; -2.090
Knook is a small village and civil parish in Wiltshire, England. The village is on the River Wylye at the edge of Salisbury Plain, about 4 miles (6.4 km) south-east of Warminster, on the A36 road to Salisbury.
The parish includes Knook Camp, an accommodation centre for the Salisbury Plain military training area, part of the Defence Training Estate.
Knook, together with Heytesbury, Tytherington and Imber (the last of which has no residents) elects a parish council called Heytesbury, Imber and Knook. Local government services are provided by Wiltshire Council.
The Iron Age hillfort known as Knook Castle is in the adjacent parish of Upton Lovell.
The Domesday Book of 1086 records the manor of Knook as Cunuche, and its entry mentions a woman of the manor called Leofgyth "who made gold embroideries for the king and queen and still does so".
Much of the present manor house was built in 1637. It is Grade I listed.