The island of Jersey and the other Channel Islands represent the last remnants of the medieval Duchy of Normandy that held sway in both France and England. Jersey lies in the Bay of Mont St Michel and is the largest of the Channel Islands. It has enjoyed self-government since the division of the Duchy of Normandy in 1204.

It has been an island for approximately 8,000 years and at its extremes it measures 10 miles east to west and six miles north to south. The earliest evidence of human activity in the island dates to about 250,000 years ago when bands of hunters used the caves at La Cotte de St Brelade as a base for hunting mammoth. There was sporadic activity in the area by nomadic bands of hunters until the introduction of settled communities in the Neolithic period, which is marked by the building of the ritual burial sites known as dolmens. The number, size and visible locations of these megalithic monuments (especially La Hougue Bie) have suggested that social organisation over a wide area, including surrounding coasts, was required for the construction. Archaeological evidence shows that there were trading links with Brittany and the south coast of England during this time. It would appear that the island was significant enough to inspire large-scale construction projects.

Jersey, officially the Bailiwick of Jersey, French: Bailliage de Jersey ( /ˈdʒɜrzi/, French: [ʒɛʁzɛ]; Jèrriais: Jèrri), is a British Crown Dependency off the coast of Normandy, France. As well as the island of Jersey itself, the bailiwick includes two groups of small islands that are no longer permanently inhabited, the Minquiers and Écréhous, and the Pierres de Lecq and other rocks and reefs.

Jersey is a self-governing parliamentary democracy under a constitutional monarchy, with its own financial, legal and judicial systems.

The island of Jersey is the largest of the Channel Islands. Although the Bailiwicks of Jersey and Guernsey are often referred to collectively as 'the Channel Islands', they are not a constitutional or political unit. Jersey has a separate relationship to the British Crown from the other Crown Dependencies of Guernsey and the Isle of Man. It is not part of the United Kingdom, and has an international identity separate from that of the UK but the United Kingdom is constitutionally responsible for the defence of Jersey. Jersey is not a part of the European Union but has a special relationship with it, being treated as part of the European Community for the purposes of free trade in goods.