Avoncliff is a hamlet in the Parish of Westwood and comprises 27 homes (3 of which are actually in the parish of Winsley), several boat homes and a public house.

The hamlet lies in the bottom of the valley formed by the River Avon and is divided into 3 sectors by the Kennet and Avon Canal, the railway and the River Avon. Avoncliff is dominated by the Avoncliff aqueduct which carries the Kennet and Avon Canal over the River Avon and the railway and is bounded on its eastern edge by mill buildings and on its western edge by Ancliff Square, an imposing rectangular building formerly known as The Old Court.