The London Borough of Ealing is a London Borough in west London, England, and forms a part of Outer London. The London borough was formed in 1965 by the merging the area of the Municipal Borough of Ealing, the Municipal Borough of Southall along with the Municipal Borough of Acton. The London Borough of Ealing borders the London Borough of Hillingdon towards the west, the London Borough of Harrow and the London Borough of Brent towards the north, the London Borough of Hammersmith and Fulham to the east and also the London Borough of Hounslow towards the south. It covers a total area of around 21.44 square miles.
Based on population estimates from the middle of 2014, the borough includes a permanent population of about 342118 inhabitants. This makes it the 3rd biggest London Borough in population, and 11th largest in size, covering a part of west London along with a small a part of northwest London. Its administrative centre is Ealing Broadway. Other main centres consist of Acton, Greenford and Southall.
The town is served by many National Rail and London Underground stations. In addition to Brentford, the London Borough of Ealing is the setting for much of the action in Robert Rankin's series of comedic novels, The Brentford Trilogy, which at present is made up of six volumes. Ealing is also the main setting for 'The Sarah Jane Adventures', being the place of Sarah Jane Smith's residence. 330 hectares within the borough are designated as part of the Metropolitan Green Belt.