Hendon is an urban area in the Borough of Barnet, northwest London 7 miles (11 km) northwest of Charing Cross. Hendon was an ancient manor and parish in the county of Middlesex and a former borough, the Municipal Borough of Hendon; it has been part of Greater London since 1965. Hendon falls almost entirely within the NW4 postcode, while the West Hendon part falls in NW9. Colindale to the northwest was once considered part of Hendon but is today separated by the M1 motorway.

The London Borough of Barnet is a local authority area on the northern outskirts of London. The borough was formed in 1965 from parts of the ceremonial counties of Middlesex and Hertfordshire. It is the second largest London borough by population with 389,344 inhabitants as of 2021, also making it the 17th largest district in England. The borough covers an area of 86.74 square kilometres (33 sq mi), the fourth highest of the 32 London boroughs, and has a population density of 45.8 people per hectare, which ranks it 25th.