Hornsey, also known as Hornsey St Mary or Haringay, is one of the ancient parishes of Middlesex. In 1894 it became an Urban District, which was incorporated in 1903 to become a Municipal Borough. Hornsey Municipal Borough was abolished in 1965, becoming part of the London Borough of Haringey (which takes its name from a variant spelling of one of the variant names of this parish).
Hornsey is a district in London Borough of Haringey in north London, England. Whilst Hornsey was formerly the name of a much larger parish and later a municipal borough of Middlesex, today, the name usually refers only to the London district. It is an inner-suburban area located north of Charing Cross.