London is the largest urban area and capital city of the United Kingdom. It is located in the southeast of Great Britain. The London region covers an area of , and had a population of 7,172,036 in 2001 and a population density of 4,542 people per square kilometre. A larger area, referred to as the London Metropolitan Region or the London Metropolitan Agglomeration covers an area of , and had a population of 12,653,500 and a population density of 1,510 people per square kilometre.