South East England is one of the nine official regions of England that are in the top level category for statistical purposes. It consists of the nine counties of Berkshire, Buckinghamshire, East Sussex, Hampshire, the Isle of Wight, Kent, Oxfordshire, Surrey and West Sussex. South East England is the third-largest region of England, with a land area of 19,072 square kilometres (7,364 sq mi), and is also the most populous with a total population of 9,642,942 in 2024.
South East England contains eight legally chartered cities: Brighton and Hove, Canterbury, Chichester, Milton Keynes, Oxford, Portsmouth, Southampton and Winchester. Officially it does not include London, which is a separate region. The geographical term for "South East England" may differ from the official definition of the region, for example London, Bedfordshire, Hertfordshire and Essex are sometimes referred to as being in the south east of England. This article only considers the South East as being the official statistical region.