Brentwood is a town and the principal settlement of the Borough of Brentwood, part of Essex in England.It is located in the London commuter belt, 20 miles (30 km) east north-east of Charing Cross in London and near to the M25 motorway.

Brentwood is a suburban town with a small, but expanding shopping area and high street. Beyond this is extensive sprawling residential development entirely surrounded by open countryside and woodland; some penetrating to within only a few hundred yards of the town centre. It is perhaps most widely known for Brentwood School and for several businesses based in the town. Brentwood is home to many British celebrities, most notably

Several notable businesses are located in Brentwood. The Ford Motor Company UK headquarters are located in the nearby suburb of Warley and SOSS hinge manufacturers NV Tools are still based here. The headquarters of Amstrad are located in Brentwood, despite TV show The Apprentice using overhead views of One Canada Square and the Canary Wharf business complex in London as an accompaniment to interior shots of the Amstrad offices.; in 2008, the firm announced a move of HQ to Loughton. Countryside Properties, the property developer, also have a substantial HQ in the town.

Well known businesses that used to operate in the town include Thermos  the famous vacuum flask manufacturer, and Nissen whose UK factory and HQ were established in the town by Ted Blake in the mid-1960's but eventually shut down in the 1980s.