The station developed on three contiguous sites: The West Coast Main Line (WCML) station was opened by the London & North Western Railway on 1 September 1866 to replace the London and Birmingham Railway's Willesden station of 1841 which was 0.5 miles (0.80 km) to the northwest. Passenger services ended in 1962 when the platforms were removed during electrification of the WCML to allow the curvature of the tracks to be eased. Later the bridges for the North London Line (NLL) were rebuilt. The High-Level station on the NLL was opened by the North London Railway in 1869 on a track crossing the WCML roughly at right angles. The 'Willesden New Station' or Low-Level station on the Watford DC Line was opened in 1910 to the north of the main line with two outer through platforms and two inner bay platforms at the London end. The bay platforms were originally long enough for four-coach Bakerloo trains when such trains ran outside peak times, but were shortened in the 1960s when a new toilet block was installed; in more recent times the platform buildings have been reconstructed and the bay length increased due to the addition of a fourth coach to class 378 trains, followed in October 2014 by a further westward excavation in preparation for the addition of a fifth coach to these trains.
The high-level (HL) station consists of an island platform rebuilt in 1956, with faces as platforms 4 and 5, which are roughly at the level of Old Oak Lane to the west of the station, serving the NLL and the West London Line. The low-level station, at the level of the area to the south, is an Edwardian island platform, with outer faces as platforms 1 and 3 and northern bay platform bay as platform 2, the southern bay now has no track. In October 2014 the DC line was closed temporarily between Wembley Central and Queens Park reportedly by Network Rail (London Overground) to allow platform 2 to be extended further west as a through platform. Platforms 1 and 3 are used by the Bakerloo line services, which began on 10 May 1915, and London Overground services between Euston and Watford Junction. The station has boarding ramps, lifts, wi-fi and a bridge.
Connections: National Rail. London Overground. The station area is served by London Buses routes 18, 220, 228, 266, 487 and night route N18.