Brentford () is a town in western Greater London, England and part of the London Borough of Hounslow. It lies at the confluence of the River Brent and the Thames, 8 miles (13 km) west of Charing Cross. Historically part of Middlesex, it has formed part of Greater London since 1965. Its economy has diverse company headquarters buildings which mark the start of the M4 corridor; in transport it also has two railway stations and Boston Manor Underground station on its north-west border with Hanwell.