The High Court of Judicature at Madras, one of the three High Courts in India established at the Presidency Towns by Letters Patent granted by Her Majesty Queen Victoria, bearing date 26th June, is the highest Court in the State of Tamil Nadu, exercising Original Jurisdiction over the City of Madras and Appellate Jurisdiction over the entire State as well as extra-ordinary Original Jurisdiction, Civil and Criminal, under the Letters Patent and Special Original Jurisdiction for the issue of writs under the Constitution of India.

The administration of Justice in the Civil and Criminal Courts in the districts constituted under the Civil Courts Act and the Code of Criminal Procedure respectively is carried on by the following categories of Judicial officers.