Segsbury Camp or Segsbury Castle is an Iron Age hillfort on the crest of the Berkshire Downs, near the Ridgeway above Wantage, in the Vale of White Horse district of Oxfordshire, England.

[1] Excavation at the site by Dr Phené in 1871 discovered a cist grave on the south side of the hillfort rampart.

Finds included a shield boss and fragments of an urn or drinking cup.

The report on this work describes the periodic occupation of the hillfort between the 6th and 2nd centuries BC and suggests that it was a communal centre for various activities, including sheep management and exchange.

Lock, G., Gosden, C. and Daly, P. 2005, Segsbury Camp: Excavations in 1996 and 1997 at an Iron Age hillfort on the Oxfordshire Ridgeway, Oxford University School of Archaeology, Monograph 61