Knollbury is a scheduled Iron Age hillfort enclosure to the north west of Chadlington in Oxfordshire. Believed to be defensive in nature the enclosure is rectangular (100 metres by 150 metres) formed by a 2-to-4-metre-high (6.6 to 13.1 ft) and 10-metre-wide (33 ft) earth banks. The two gaps in the earth banks at the eastern corners are believed to be of a later date.

• Knollbury on the English Heritage's Record of Scheduled Monuments (pdf file)

51°54′17″N 1°32′29″W / 51.9047°N 1.5415°W / 51.9047; -1.5415