Capital city and District in Delhi, India New Delhi Capital city and District Clockwise from top left: Secretariat Building, Connaught Place, Jantar Mantar, Rashtrapati Bhavan, India Gate New Delhi Location in Delhi State Show map of Delhi New Delhi New Delhi (India) Show map of India Coordinates: 28°36′50″N 77°12′32″E﻿ / ﻿28.61389°N 77.20889°E﻿ / 28.61389; 77.20889Coordinates: 28°36′50″N 77°12′32″E﻿ / ﻿28.61389°N 77.20889°E﻿ / 28.61389; 77.20889 Country India Union territory Delhi Established 1911 Inaugurated 1931 Area [1] • Capital city 42.7 km2 (16.5 sq mi) Elevation 216 m (709 ft) Population (2011)[2] • Capital city 257,803 • Density 6,000/km2 (16,000/sq mi) • Metro (2016) [3] 26,454,000 Demonym(s) Dilliwale/ Delhite Time zone UTC+5:30 (IST) Pincode(s) 110xxx Area code(s) +91-11 Vehicle registration DL-1x-x-xxxx to DL-14x-x-xxxx Civic agency New Delhi Municipal Council Website www.ndmc.gov.in