Powerstock is a village and civil parish in south west Dorset, England, situated in a steep valley on the edge of the Dorset Downs, 5 miles (8.0 km) north-east of the market town of Bridport. The civil parish includes the village of West Milton to the west and the summit and northern slopes of Eggardon Hill to the south-east. Powerstock village contains many cottages and 2 inns: The Three Horseshoes near the church and The Marquis of Lorne Inn on the other side of the valley in a small hamlet called Nettlecombe. The small Mangerton River runs through the valley.