Hazelbury Bryan is a village and civil parish in the county of Dorset in southern England. It is situated in the Blackmore Vale in the North Dorset administrative district, approximately southwest of the small town of Sturminster Newton. The parish includes the hamlets of Droop, Kingston, Parkgate, Pidney, Pleck, Wonston and Woodrow. In the 2011 census the parish had a population of 1,059. The parish is the most populous place in the electoral ward of Lydden Vale. This ward extends from the most northerly parish of Fifehead Neville south to Mappowder also west to Glanvilles Wootton. The total population of the ward at the 2011 Census was 1,967.
The name of the village is derived from the Old English hæsel and bearu, meaning a hazel grove or wood, plus the manorial name of the Bryene or de Bryan family; Sir Guy de Bryan, of Woodsford Castle, gave his name to the village in the 14th century when he married the daughter of the First Earl of Salisbury. The original settlement in the village is the hamlet of Droop, which is the location of the parish church. The church dates mostly from the 15th century, though it is perhaps the third building to have existed on the site. The other hamlets in the village are believed to have originated as a result of the Black Death twice afflicting the original settlement, and the villagers responding by burning it and rebuilding several smaller settlements on higher ground nearby.
The geology of the parish consists of Oxford clay in the northwest, a band of Corallian limestone and sand running from southwest to northeast, and Kimmeridge clay in the southeast. Drainage consists of several small streams flowing northwest and north into the River Lydden and northeast into the River Stour.