Friern Barnet Urban District was a local government area in Middlesex, England created in 1883 from the civil parish Friern Barnet. It was succeeded by the London Borough of Barnet in 1965 as one of the smaller of its contributory predecessor districts. It was at the local level governed for nine years by the local board, then by Friern Barnet Urban District Council which operated primarily with separate functions from the County Council, operating occasionally for major planning decisions and major projects together with that body, Middlesex County Council.