The National Capital Region is a planning region centered upon the National Capital Territory (NCT) of Delhi in India. It encompasses Delhi and several districts surrounding it from the states of Haryana, Uttar Pradesh, and Rajasthan. The NCR and the associated National Capital Region Planning Board (NCRPB) were created in 1985 to plan the development of the region and to evolve harmonized policies for the control of land-uses and development of infrastructure in the region. Prominent cities of NCR include Delhi, Faridabad, Ghaziabad, Gurgaon and Noida.

Delhi, officially the National Capital Territory (NCT) of Delhi, is a city and a union territory of India containing New Delhi, the capital of India. Lying on both sides of the Yamuna river, but chiefly to the west, or beyond its right bank, Delhi shares borders with the state of Uttar Pradesh in the east and with the state of Haryana in the remaining directions. Delhi became a union territory on 1 November 1956 and the NCT in 1995. The NCT covers an area of 1,484 square kilometres (573 sq mi). According to the 2011 census, Delhi's city proper population was over 11 million, while the NCT's population was about 16.8 million.