The demonym of the city Chennai Madras is Durbanite . The land area of the city is 840 km 2  (325 sq mi) . Area: 223 km2 (86 sq mi) is the area of the city namedChennai Madras . The postal code of the city is 95100 . The city province is Lusaka Province . The lowest elevation of Chennai Madras is 246 ft . 01 is the area code of Chennai Madras . The urban region has Population (2014): 5,160,512 population . The mayor of Chennai Madras is Oscar Malapitan . The density of  people in  the urban region of Chennai Madras is 2,300/km 2  (6,100/sq mi) . The highest elevation of Chennai Madras is 33 m (108 ft) . The metro region has 13,542,900 population . The density of  residents in Chennai Madras is 9,821/km 2  (25,436/sq mi) (2017) . Chennai Madras is located in South Africa . The city water area is 4.46 sq km  (1.72 sq mi) . 33°27′S 70°40′W﻿ / ﻿33.450°S 70.667°W are the coordinates of the city. . Chennai Madras is at an elevation of 990 m . The city was incorporated in 1842
The peak of the city is at 75 m 