Pertwood is an ancient settlement and former parish, near Warminster in the county of Wiltshire in the west of England. Its land and houses now lie in the parishes of East Knoyle, Sutton Veny and Chicklade, and have fewer than twenty inhabitants. The settlements are close together at Upper Pertwood (also called Higher Pertwood) and Lower Pertwood. Higher Pertwood is now Pertwood Manor Farm, while Lower Pertwood is Pertwood Organic Farm.