East Sussex is a county in South East England. It is bordered by the counties of Kent to the north and east, West Sussex to the west, and Surrey for a short distance to the north-west, as well as the English Channel to the south.East Sussex is part of the historic county of Sussex, which has its roots in the ancient kingdom of the South Saxons, who established themselves there in the 5th century AD, after the departure of the Romans. Archaeological remains are plentiful, especially in the upland areas. The area's position on the coast has also meant that there were many invaders, including the Romans and later the Normans.