Chobham Common is a 655.7-hectare (1,620-acre) biological Site of Special Scientific Interest north of Chobham in Surrey. It is a Nature Conservation Review site, Grade I and a national nature reserve. It is part of the Thames Basin Heaths Special Protection Area and the Thursley, Ash, Pirbright and Chobham Special Area of Conservation. It contains three scheduled monuments. Most of the site is managed by the Surrey Wildlife Trust as the Chobham Common nature reserve, but the SSSI also includes a small private reserve managed by the Trust, Gracious Pond.