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Delhi – 32.06 million
Delhi is a city and a union territory of India, with New Delhi being the capital of India. It is settled on three sides by the state of Haryana and on the east by Uttar Pradesh. The NCT has an area of 1,484 square kilometers. Delhi is the second most populous city in the world in 2023 with a population of 32.06 million. Also, it is the most populous city in India. Delhi is one of the oldest cities in the world and has been inhabited continuously since the 6th century BCE.