Sir Martin Daniel Chamberlain (born 25 November 1973)[1] is a British High Court judge.

[1] Chamberlain was called to the bar at Middle Temple in 1997 and joined Brick Court Chambers in 2000 where he practised public law and human rights.

[1][4] On 1 October 2019, Chamberlain was appointed a judge of the High Court at the age of 45 and assigned to the Queen's Bench Division.

[1] In 2019, he was part of the High Court who decided the Metropolitan Police's ban of Extinction Rebellion's 2019 protests was unlawful.

[7] He has participated regularly in the preparation of the Administrative Court Judicial Review Guide.