Thompson Water, Carr and Common is a 154.7-hectare (382-acre) biological Site of Special Scientific Interest north of Thetford in Norfolk, England. Most of it is managed by the Norfolk Wildlife Trust as Thompson Common. It is a Nature Conservation Review site, Grade I, and part of the Norfolk Valley Fens Special Area of Conservation. It is crossed by the Great Eastern Pingo Trail Local Nature Reserve.
East Winch Common is a 26.1-hectare (64-acre) biological Site of Special Scientific Interest south-east of King's Lynn in Norfolk, England. It is common land and is managed by the Norfolk Wildlife Trust.
Roydon Common is a 194.9-hectare (482-acre) biological Site of Special Scientific Interest east of King's Lynn in Norfolk, England. It is also a Grade I Nature Conservation Review site, a National Nature Reserve and a Ramsar site. It is part of the Roydon Common and Dersingham Bog Special Area of Conservation and Roydon Common and Grimston Warren nature reserve, which is managed by the Norfolk Wildlife Trust,
An area of 39.1 hectares in the north-west corner of Geddington Chase has been designated a biological Site of Special Scientific Interest (SSSI). It is located south-east of Corby in Northamptonshire.
Hunstanton Park Esker is a 17.3-hectare (43-acre) geological Site of Special Scientific Interest east of Hunstanton in Norfolk, England. The esker extends 1.5 km from north of Ringstead Downs to Hunstanton Hall. It is a Geological Conservation Review site.
Barnham Cross Common is a 69.1-hectare (171-acre) biological Site of Special Scientific Interest on the southern outskirts of Thetford in Norfolk, England. It is owned by Thetford Town Council and is registered common land. It is also a Local Nature Reserve and a Nature Conservation Review site, Grade 1. It is part of the Breckland Special Area of Conservation and Special Protection Area.
Booton Common is an 8.2-hectare (20-acre) biological Site of Special Scientific Interest north-west of Norwich in Norfolk, England. It is managed by the Norfolk Wildlife Trust and is a Special Area of Conservation
Boughton Fen is a 15.7-hectare (39-acre) biological Site of Special Scientific Interest east of Downham Market in Norfolk, England. it is common land registered to Boughton Parish Council.
Bridgham and Brettenham Heaths is a 439.9-hectare (1,087-acre) biological Site of Special Scientific Interest north-east of Thetford in Norfolk, England. It is a Nature Conservation Review site, Grade I, and part of the Breckland Special Area of Conservation and Special Protection Area. Brettenham Heath is a National Nature Reserve.
Castle Acre Common is a 17.8-hectare (44-acre) biological Site of Special Scientific Interest east of King's Lynn in Norfolk, England.
East Ruston Common is a 34.5-hectare (85-acre) biological Site of Special Scientific Interest south-east of North Walsham in Norfolk, England.
East Walton and Adcock's Common is a 62.4-hectare (154-acre) biological and geological Site of Special Scientific Interest south-east of King's Lynn in Norfolk, England. It is a Geological Conservation Review site and part of Norfolk Valley Fens Special Area of Conservation
Cockthorpe Common, Stiffkey is a 7.1-hectare (18-acre) biological Site of Special Scientific Interest east of Wells-next-the-Sea in Norfolk, England. It is in the Norfolk Coast Area of Outstanding Natural Beauty.
Flordon Common is a 9.9-hectare (24-acre) biological Site of Special Scientific Interest south-east of Wymondham in Norfolk, England. It is a registered common part of the Norfolk Valley Fens Special Area of Conservation.
Foulden Common is a 139-hectare (340-acre) biological Site of Special Scientific Interest east of Downham Market in Norfolk, England. It is a Nature Conservation Review site, Grade 2, and part of the Norfolk Valley Fens Special Area of Conservation.
Syderstone Common is a 43.7-hectare (108-acre) biological Site of Special Scientific Interest west of Fakenham in Norfolk, England. An area of 24-hectare (59-acre) is managed by the Norfolk Wildlife Trust.
Whitwell Common is a 19.4-hectare (48-acre) biological Site of Special Scientific Interest north-east of Dereham in Norfolk, England.
Middle Harling Fen is a 11.8-hectare (29-acre) biological Site of Special Scientific Interest south of East Harling in Norfolk, England.
Mattishall Moor is a 5.5-hectare (14-acre) biological Site of Special Scientific Interest east of Dereham in Norfolk, England.
