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 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 as well as the London Borough of Brent to the north, the London Borough of Hammersmith and Fulham to the east and the London Borough of Hounslow to the south. It covers a total area of about 21.44 square miles.
As per population estimates from the middle of 2014, the borough includes a permanent population of about 342118 people. This makes it the third largest London Borough in population, and 11th largest in size, covering part of west London and also a small a part of northwest London. Its administrative centre is Ealing Broadway. Other major centres consist of Acton, Greenford and Southall.
The town is served by numerous National Rail and London Underground stations. Along with Brentford, the London Borough of Ealing is the setting for a lot 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 key setting for 'The Sarah Jane Adventures', being the location of Sarah Jane Smith's residence. 330 hectares inside the borough are designated as part of the Metropolitan Green Belt.