Pinner is a London Underground station. The station was opened in 1885 as part of the Victorian expansion of dormitory suburbs, and was one of the stations included in the Metro-land project in the early 20th century. The site is served by several bus routes including links to the Hatch End railway station which was known as Pinner & Hatch End prior to 1920. Step free facilities were opened in 2008. The station is on the Metropolitan line between Northwood Hills and North Harrow stations, and is in Travelcard Zone 5.

The Metropolitan line, colloquially known as the Met, is a London Underground line between Aldgate in the City of London and Amersham and Chesham in Buckinghamshire, with branches to Watford in Hertfordshire and Uxbridge in Hillingdon. Printed in magenta on the tube map, the line is 41.4 miles (66.7 km) in length and serves 34 stations. Between Aldgate and Finchley Road, the track is mostly in shallow "cut and cover" tunnels, apart from short sections at Barbican and Farringdon stations. The rest of the line is above ground, with a loading gauge of a similar size to those on main lines. Just under 94 million passenger journeys were made on the line in 2019.