''This article is about the metropolis of Delhi. For the capital of India, see New Delhi. For other uses see Delhi (disambiguation).

Delhi (, , ) is a metropolis in northern India. The name Delhi also refers to the National Capital Territory of Delhi (NCT) , which is a special union territory jointly administered by the Central government, the NCT elected government and three municipal corporations. The metropolis of Delhi and the National Capital Territory of Delhi are coextensive and for most practical purposes they are considered to be the same entity. New Delhi, an urban area within the metropolis of Delhi, is the seat of the Government of India.

Delhi is the sixth most populous metropolis in the world with a population of 15.3 million (2005 figure). Delhi's metropolitan area, informally known as the National Capital Region (NCR), comprises of the NCT and the neighbouring satellite towns of Faridabad and Gurgaon in Haryana, and Noida and Ghaziabad in Uttar Pradesh making it the sixth most populous agglomeration in the world, with an estimated population of 19.7 million .