North London is the northern part of London, England, north of the River Thames. It extends from Clerkenwell and Finsbury, on the edge of the City of London financial district, to Greater London's boundary with Hertfordshire.
The term is used to differentiate the area from South London, East London and West London. Some parts of north London are also part of Central London. There is a Northern postal area, but this includes some areas not normally described as part of north London, while excluding many others that are.