Butser Hill is a hill and nature reserve in Hampshire, England. South-west of Petersfield, it is a 239.7-hectare (592-acre) biological and geological Site of Special Scientific Interest. It is a National Nature Reserve and a Special Area of Conservation. Part of it is a Geological Conservation Review site and an area of 84.8 hectares, Oxenbourne Down, is designated a Local Nature Reserve. Part of it is a Scheduled Monument.