The Isle of Sheppey is an island off the northern coast of Kent

Kent

Kent is a county in southeast England, and is one of the home counties. It borders East Sussex, Surrey and Greater London and has a defined boundary with Essex in the middle of the Thames Estuary. The ceremonial county boundaries of Kent include the shire county of Kent and the unitary borough of...

, England in the Thames Estuary

Thames Estuary

The Thames Mouth is the estuary in which the River Thames meets the waters of the North Sea.It is not easy to define the limits of the estuary, although physically the head of Sea Reach, near Canvey Island on the Essex shore is probably the western boundary...

, some 46 miles (74 km) to the east of London

London

London is the capital city of :England and the :United Kingdom, the largest metropolitan area in the United Kingdom, and the largest urban zone in the European Union by most measures. Located on the River Thames, London has been a major settlement for two millennia, its history going back to its...

. It has an area of 36 square miles (93.2 km²). The island forms part of the local government district of Swale

Swale

Swale is a local government district with borough status in Kent, England. Its council is based in Sittingbourne. The borough is named after the narrow channel called The Swale, a channel that separates the mainland of Kent from the Isle of Sheppey, and which occupies the central part of the...

. Sheppey is derived from the ancient Saxon

Saxons

The Saxons were a confederation of Germanic tribes originating on the North German plain. The Saxons earliest known area of settlement is Northern Albingia, an area approximately that of modern Holstein...

 "Sceapige", meaning isle of sheep, and even today the extensive marshes which make up a considerable proportion of the island provide grazing for large flocks of sheep.