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