Fyfield Down (grid reference SU136709) is part of the Marlborough Downs, about 1.5 miles (2.4 km) north of the village of Fyfield, Wiltshire. The down is a 325.3 hectare biological and geological Site of Special Scientific Interest, notified in 1951. The down has the best assemblage of sarsen stones in England, known as the Grey Wethers.