Ambersham Common is a 141.6-hectare (350-acre) biological Site of Special Scientific Interest south-east of Midhurst in West Sussex. It is a Nature Conservation Review site, Grade 2.

This site is mainly heathland with a wide range of invertebrates, including three nationally rare species. There are also areas of bog and acid carr. It has a diverse variety of bird species, including some which are rare, such as nightjars, woodlarks and Dartford warblers.

Roads and footpaths cross the common.