The London Borough of Barnet is a suburban London borough in North London, England, forming part of Outer London. It is the second largest London borough by population with 331,500 inhabitants and covers an area of , the fourth highest. It borders Hertfordshire to the north and five other London boroughs: Harrow and Brent to the west, Camden and Haringey to the south-east and Enfield to the east. The borough was formed in 1965 from parts of the counties of Middlesex and Hertfordshire. The local authority is Barnet London Borough Council.