Harrow-on-the-Hill station is a London Underground station served by National Rail and London Underground (LU) trains. It is located between College Road and Lowlands Road in the Greenhill area of Harrow, about a half-mile north of the locality from which it takes its name.

The station was opened as "Harrow" on 2 August 1880, when the Metropolitan Railway was extended from its previous terminus at Willesden Green. Its name was changed to "Harrow-on-the-Hill" on 1 June 1894. The Station is located in TravelCard Zone: 5.