The London Borough of Barnet is a suburban London borough in North London. The borough was formed in 1965 from parts of the ceremonial counties of Middlesex and Hertfordshire. It forms part of Outer London and is the largest London borough by population with 384,774 inhabitants, also making it the 13th largest district in England. The borough covers an area of 86.74 square kilometres, the fourth highest of the 32 London boroughs, and has a population density of 45.8 people per hectare, which ranks it 25th.
Barnet borders the Hertfordshire district of Hertsmere to the north and five other London boroughs: Camden and Haringey to the southeast, Enfield to the east, as well as Harrow and Brent to the west of the ancient Watling Street. The borough's major urban settlements are Hendon, Finchley, Golders Green, Friern Barnet, Chipping Barnet, Whetstone, and Edgware; there are also village settlements notably Totteridge and Arkley along with rural areas and countryside part of the Green Belt.
The local authority is Barnet London Borough Council, based in Colindale.