West Blean is an area of ancient semi-natural woodland with SSSI status, 5km north of the city of Canterbury in Kent, England, also including Thornden Wood. It is managed by the Kent Wildlife Trust. This reserve makes up a substantial portion of the Blean complex, potentially covering thousands of hectares, and forming one of the largest concentrated tracts of ancient semi-natural woodland in England. The reserve itself covers some 489 hectares purchased in December 2003 and the Trust continues to seek further opportunities to expand the site.