The United Kingdom is a sovereign state located off the northwestern coast of continental Europe. It is an island country, spanning an archipelago including Great Britain, the northeastern part of the island of Ireland, and many small islands.

The UK is a developed country, with the world's sixth largest economy by nominal GDP and the sixth largest by purchasing power parity. It was the world's first industrialised country and the world's foremost power during the 19th and early 20th centuries, but the economic and social cost of two world wars and the decline of its empire in the latter half of the 20th century diminished its leading role in global affairs.

The UK does not de jure have an official language but the predominant spoken language is English, a West Germanic language descended from Old English which features a large number of borrowings from Old Norse, Norman French and Latin.

Tourism is very important to the British economy. With over 27 million tourists arriving in 2004, the United Kingdom is ranked as the sixth major tourist destination in the world. London, by a considerable margin, is the most visited city in the world with 15.6 million visitors in 2006, ahead of 2nd placed Bangkok (10.4 million visitors) and 3rd placed Paris (9.7 million).

The culture of the United Kingdom—British culture— may be described as informed by its history as a developed island country, major power, and also as a political union of four countries, with each preserving elements of distinctive traditions, customs and symbolism.

Major sports including association football, rugby league, rugby union, boxing, badminton, cricket, tennis and golf originated, or were substantially developed, in the United Kingdom and the states that preceded it. A 2006 poll found that football is the most popular sport in the United Kingdom.