The demonym of the city Surabaya City is cuzqueno/a . The mayor of Surabaya City is Norman Maurice Armitage . 1,700/sq km  (4,400/sq mi) is the density of inhabitents in Surabaya City . The area of the city is 47.84 sq mi (123.90 km 2 )The population of Surabaya City is Population: 3,457,409 . The water area of the city is 0.68 sq mi (1.77 km 2 ) . Area: 2,787 km2 (1,076 sq mi) is the area of the urban region of Surabaya CityThe urban region has 3,372,090 population . The city province is Luanda . The postal code of the city is 207, 208, 220 - 224, 226 - 228, 231 - 239, 241 - 244, 247 - 249, 251 - 253 . The area of the metro region is 7,952 sq mi (20,596 km2)The population of the metro region is Population: 13,123,948 . Surabaya City is named for Confluence of Grand River and Gunnison River .  The city area code is (+20) 3 . Surabaya City is at an elevation of 2 m . 43°23′9″N 8°24′23″W﻿ / ﻿43.38583°N 8.40639°W﻿ / 43.38583; -8.40639 are the coordinates of the city. . The Surabaya City citys' lowest elevation is 1,250 ft . Surabaya City is the government of U.S. National Park Service . The density of  residents in  the urban region of Surabaya City is 464.71/km 2  (1,203.6/sq mi) . The highest elevation of Surabaya City is 14,110 ft (4,300 m) . On March 6, 1836 (city) the city was incorporated . 1,600/km 2  (4,200/sq mi) is the density of inhabitents in  the metro region of Surabaya City . The land area of the city is 16.0 sq mi (41.4 km 2 ) . Surabaya City is located in Germany
The day to day governing of the city is supervised by Zhang Guoqing