Bury Castle near Brompton Regis in the English county of Somerset was an Iron Age univallate hillfort which was reused with the creation of a motte after the Norman Conquest. It has been designated as a scheduled monument.
It is an oval enclosure just above the confluence of the River Haddeo and River Exe. It is approximately long and wide.
In the late 1130s, a civil war, known as the Anarchy, broke out in England between the supporters of King Stephen and the Empress Matilda. A motte and bailey castle was built on the Bury Castle side, probably by William de Say. In 1198 Richard I confirmed that Brompton should be part of the inheritance of Matilda.
The motte measures and was placed on the southern tip of the promontory, with the bailey beyond around across.