1,600/km 2  (4,200/sq mi) is the density of inhabitents in  the metro region of Surabaya City . The Surabaya City citys' lowest elevation is 1,250 ft . The city was incorporated in March 6, 1836 (city) . The postal code of the city is 207, 208, 220 - 224, 226 - 228, 231 - 239, 241 - 244, 247 - 249, 251 - 253 . The demonym of the city Surabaya City is cuzqueno/a . 1,700/sq km  (4,400/sq mi) is the density of inhabitents in Surabaya City . The land area of the city is 16.0 sq mi (41.4 km 2 ) .  The city area code is (+20) 3 . This city is named after Confluence of Grand River and Gunnison River . Norman Maurice Armitage is the mayor of Surabaya City . Surabaya City is the government of U.S. National Park Service . The province of the city Surabaya City is Luanda . Surabaya City is located in Germany . The highest elevation of Surabaya City is 14,110 ft (4,300 m) . 7,952 sq mi (20,596 km2) is the area of the metro region of Surabaya CityThe metro region has Population: 13,123,948 population . 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. . 47.84 sq mi (123.90 km 2 ) is the area of the city namedSurabaya CityThe population of Surabaya City is Population: 3,457,409 . 464.71/km 2  (1,203.6/sq mi) is the density of residents in  the urban region of Surabaya City . The city water area is 0.68 sq mi (1.77 km 2 ) . The urban region is Area: 2,787 km2 (1,076 sq mi) in area3,372,090 is the population of the urban region of Surabaya City
There are more than 1605 residents per sq km in Surabaya City