Hornsey is a district of north London, England, in the London Borough of Haringey. It is an inner-suburban, for the most part residential, area centred 10 km (6.2 mi) north of Charing Cross. It adjoins green spaces Queen's Wood to the west and Alexandra Park to the north, and lies in the valley of the now-culverted River Moselle. The central core of the area is known as Hornsey Village.

The London Borough of Haringey is a London borough in north London, classified by some definitions as part of Inner London, and by others as part of Outer London. It was created in 1965 by the amalgamation of three former boroughs. It shares borders with six other London boroughs. Clockwise from the north, they are: Enfield, Waltham Forest, Hackney, Islington, Camden, and Barnet.