Kingley Vale is a 204.4-hectare (505-acre) biological Site of Special Scientific Interest north of Chichester in West Sussex. It is also a Special Area of Conservation and a Nature Conservation Review site, Grade I. An area of 147.9 hectares is a national nature reserve. Part of the land area designated as Kingley Vale SSSI is owned by the Forestry Commission
Camp Down is a 7.3-hectare (18-acre) biological Site of Special Scientific Interest in Wiltshire in South West England. It was designated as such in 1965.
Bowerchalke Downs, is a 134 hectares biological Site of Special Scientific Interest in southern Wiltshire, England, notified in 1971.
Amberley Wild Brooks or Amberley Wildbrooks is a 327.5-hectare (809-acre) biological Site of Special Scientific Interest west of Storrington in West Sussex. An area of 80 hectares is a nature reserve managed by the Sussex Wildlife Trust It is a Site of Special Scientific Interest and a Nature Conservation Review site. It is also part of the Arun Valley Ramsar site, Special Area of Conservation and Special Protection Area.
Garston's Down is an area of downland on the Isle of Wight, rising to an altitude of 151 m (495 ft). It is located in the centre of the island, south of Carisbrooke and west of Gatcombe, and is one of the best remaining inland examples of unimproved chalk downland. An area of 20.3 hectares was notified as a Site of Special Scientific Interest (SSSI) in 1971 for its biological features. The down is situated in a remote area and provides extensive views over the surrounding countryside and distant coast.
Willingdon Down is a 67.5-hectare (167-acre) biological Site of Special Scientific Interest west of Willingdon, a suburb of Eastbourne in East Sussex. Part of it is a Neolithic causewayed enclosure which is a Scheduled Monument
Offham Marshes, also known as The Pells and Offham Marsh, is a 39.1-hectare (97-acre) biological Site of Special Scientific Interest on the northern outskirts of Lewes in East Sussex in parish of Hamsey. It includes the Pellbrook Cut, an area to the north of it called The Pells and the marshland to the south of the Cut and east of the railway track.
Burton Park SSSI is a 57.7-hectare (143-acre) biological Site of Special Scientific Interest west of Pulborough in West Sussex. A larger area of 63 hectares, including Chingford Pond to the west, is designated a Local Nature Reserve called Burton and Chingford Ponds, which is managed by the Sussex Wildlife Trust and West Sussex County Council. The site is adjacent to Burton Park, a Grade I listed building.
Coates Castle SSSI is a 7.7-hectare (19-acre) biological Site of Special Scientific Interest west of Pulborough in West Sussex.
Fairmile Bottom is a 70.2-hectare (173-acre) biological Site of Special Scientific Interest north-west of Arundel in West Sussex. An area of 61.3 hectares is also a Local Nature Reserve.
Felpham SSSI is a 1-hectare (2.5-acre) geological Site of Special Scientific Interest in Bognor Regis in West Sussex. It is a Geological Conservation Review site.
Harting Downs is a 336.3-hectare (831-acre) biological Site of Special Scientific Interest west of Midhurst in West Sussex. It is a Nature Conservation Review site, Grade I and an area of 206.6 hectares is a Local Nature Reserve which is owned and managed by the National Trust.
Levin Down is a 25.6-hectare (63-acre) biological Site of Special Scientific Interest south of Midhurst in West Sussex. It is managed by the Sussex Wildlife Trust.
Parham Park SSSI is a 263.3-hectare (651-acre) biological Site of Special Scientific Interest in the grounds of Parham Park, west of Storrington in West Sussex. It is a Nature Conservation Review site, Grade 2.
Rook Clift is a 10.7-hectare (26-acre) biological Site of Special Scientific Interest east of South Harting in West Sussex. It is also a Special Area of Conservation.
Shillinglee Lake is a 17-hectare (42-acre) biological Site of Special Scientific Interest west of Plaistow in West Sussex.
St Leonard's Forest SSSI is an 85.4-hectare (211-acre) biological Site of Special Scientific Interest east of Horsham in West Sussex. The SSSI is in two separate areas, with the western part being in the 289-hectare (710-acre) Forestry Commission managed St Leonard's Forest.
Halnaker Chalk Pit is a 6.4-hectare (16-acre) biological Site of Special Scientific Interest north-east of Boxgrove in West Sussex.
Treyford to Bepton Down is a 121.5-hectare (300-acre) biological Site of Special Scientific Interest south-west of Midhurst in West Sussex.
Heyshott Down is a 42.6-hectare (105-acre) biological Site of Special Scientific Interest south of Midhurst in West Sussex. It is a Nature Conservation Review site, Grade 2.
