Castle Green is a park and suburb in the London Borough of Barking and Dagenham, United Kingdom.

Castle Green contains a secondary school, Jo Richardson Community School, a library, theatre, arts and conference spaces, sports facilities which house Barking RFC and a community centre.

[1] The area was rural into the 18th century but was dominated by manorial estates dating from the mediaeval period.

The Becontree estate was created between 1919 and 1935 as a public housing for returning soldiers and to relieve overcrowding in the centre of London, covering the last of the borough's rural area.

[1] Barking & Dagenham Borough Council have proposed a new London Overground railway station.