Hounslow () is a large suburban town in West London located 10.7 miles (17.2 km) west-southwest of Charing Cross. The majority of Hounslow is situated within the London Borough of Hounslow, it is one of the borough’s five major towns (alongside Chiswick, Brentford, Isleworth and Feltham) whilst also acting as its administrative centre. Heathrow Airport is in the London Borough of Hillingdon, whilst the southern portion of Hounslow adjacent to the station is located within the London Borough of Richmond-upon-Thames. Hounslow, covering the TW3, TW4, TW5 and TW6 postal code areas, is identified as a major metropolitan centre in the London Plan.
Most of Hounslow, including its Town Centre, the area south of the railway station and the localities of Lampton and Spring Grove fall under the TW3 postcode. The TW4 postcode is made up of Hounslow West and parts of Cranford, whilst the TW5 postcode includes Heston and Cranford. Heathrow Airport in addition to parts of Hatton comprises the entire TW6 postcode.