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. Below is the list of the districts and subdivisions of Delhi:

Apart from this districts exists three municipal corporations, one municipal council, and one Cantonment Board within the National Capital Territory:

Delhi (/ˈdɛli/; locally pronounced Dillee or Dehli), officially the National Capital Territory of Delhi (NCT), is the largest metropolis by area and the second-largest metropolis by population in India. It is the eighth largest metropolis in the world by population with 16.7 million inhabitants in the Territory at the 2011 Census. The region has been given special status of National Capital Region under The Constitution (69th Amendment) Act, 1991. There are nearly 22.2 million residents in the greater National Capital Region urban area (which also includes the cities Noida, Greater Noida, Ghaziabad, Gurgaon,Sonepat and Faridabad along with other smaller nearby towns).

Delhi is known to have been continuously inhabited since at least the 6th century BCE, though human habitation is believed to have existed since the second millennium BCE. Delhi is also widely believed to have been the site of Indraprastha, the legendary capital of the Pandavas during the times of the Mahabharata. Delhi re-emerged as a major political, cultural and commercial city along the trade routes between northwest India and the Gangetic plain after the rise of the Delhi sultanates. It is the site of many ancient and medieval monuments, archaeological sites and remains.