Colerne is a village and civil parish in the Cotswolds Area of Outstanding Natural Beauty, midway between Bath and Chippenham in Wiltshire, England. It has an elevated and exposed position 545 feet (166 m) above sea level and overlooks the Box Valley to the south (where Isambard Kingdom Brunel's Box Tunnel is). It is bounded by a stretch of the Fosse Way Roman road to the west and by Bybrook to the south-east.