Greater London is made up of 32 boroughs and the City of London. The City of London, also known as the square mile due to its tiny area is in the very centre of Greater London and but is not actually a borough. Greater London is divided into 32 London Boroughs, each governed by a London Borough council. The City of London has a unique government dating back to the 12th century and is separate from the county of Greater London, although is still part of the region served by the Greater London Authority. Greater London, established in 1965, overlays historic counties like Middlesex and Kent, illustrating distinct administrative and geographical identities that coexist without replacement. It contains 33 local government districts: the 32 London boroughs, which form a ceremonial county also called Greater London, and the City of London, which is a separate ceremonial county. Greater London is a conurbation and one of the counties made from merging London proper with many smaller villages and towns. Together with the City of London, they form Greater London's administrative districts. The present metropolitan county of Greater London constitutes nearly all of the historic county of Middlesex (which comprises the bulk of Greater London north of the River Thames), parts of the historic counties of Kent, Essex, and Hertfordshire, and a large part of the historic county of Surrey. Greater London is divided into 32 London Boroughs, each governed by a London Borough council. The City of London has a unique government dating back to the 12th century and is separate from the county of Greater London, although is still part of the region served by the Greater London Authority. Greater London is the region and ceremonial county that covers the capital of the United Kingdom. It spans 1,572 km2 (607 sq mi) and had 8,804,769 residents at the 2021 census. That makes it the most populous county in England by a wide margin. It is divided into 33 local government districts. The Greater London Authority consists of the Mayor of London and the London Assembly. The London Mayor is distinguished from the Lord Mayor of London, who heads the City of London Corporation running the City of London. We are London. Find out about the work of the Mayor, the London Assembly and the Greater London Authority.