Monken Hadley is an area in the London Borough of Barnet, at the northern edge of Greater London, England, lying some 11 miles (18 km) north north-west of Charing Cross. Anciently a country village near Chipping Barnet in Middlesex, and from 1889 to 1965 in Hertfordshire, it is now a suburban area, while retaining some of its rural character.