The archdeaconry was created by Order in Council on 23 July 1912 from the ancient archdeaconries
of Middlesex and
of London; at its erection it consisted the
rural deaneries of Enfield, of Holborn, and of Tottenham (from the London archdeaconry) and of Hampstead, of Hornsey, of St Marylebone, of St Pancras, and of Willesden (from the Middlesex archdeaconry). Part of the archdeaconry was split off to create the
Charing Cross archdeaconry before 1989. The Hampstead archdeaconry is geographically equivalent to the episcopal area overseen by the
area Bishop of Edmonton. ==List of archdeacons==