Pinner is a suburb located in the London Borough of Harrow in northwest London, England. It is situated approximately 12 miles (19 km) northwest of Charing Cross and lies close to the border with Hillingdon. Historically, the area was part of the county of Middlesex.
As of the 2021 census, the population of Pinner was 38,698. It serves as a residential community within the Greater London area.