The National Capital Territory of Delhi is divided into nine revenue districts. Each district is headed by a Deputy Commissioner and has three subdivisions. A Subdivision Magistrate heads each subdivision. All Deputy Commissioners report to the Divisional Commissioner. These district are meant only for revenue collection & Administration. Delhi being a National Capital Territory of India, does not hold power to declare districts in its premises.
The nine districts came into existence from January 1997. Prior to that, there used to be only one district for whole of Delhi with district head quarter at Tis-Hazari.
The District Administration of Delhi is the enforcement department for all kinds of Government of Delhi and Central Government policies and exercises supervisory powers over numerous other functionaries of the Government.