Chorleywood the Local Government Act 1894 created districts as subdivisions of the newly created county councils, Chorleywood became part of the Watford Rural District, which encircled Watford. In 1913, the town was separated from Watford Rural District to become Chorleywood Urban District. In the early 1960s, researchers at the British Baking Industries Research Association in Chorleywood improved upon an earlier American bread-making process. This resulted in the Chorleywood Bread Process which is now used in over 80% of commercial bread production throughout the UK. In the 1973 BBC Television documentary, "Metro-land", Sir John Betjeman described Chorleywood as "essential Metro-land". In 1974,
Chorleywood station Metropolitan line trains from Chorleywood into London were fast trains to Baker Street, calling at , , , , and . Since December 2011 only a few morning peak hour Metropolitan line trains have been operated as fast trains, at other times the trains mostly call at all stations, adding over 10 minutes to journey times. The journey to central London takes around 35–50 minutes depending on the line and time of day. Northbound Metropolitan line trains call at all stations to or . Currently, the station has two platforms shared between the London Underground Metropolitan line and National Rail.