The city land area is 316.42 km 2  (122.17 sq mi) . The density of  inhabitents in  the metro region of Hanoi is 1,275/km 2  (3,300/sq mi) . The water area of the city is 41.21 sq mi (106.73 km 2 ) . 2,500/km 2  (6,400/sq mi) is the density of people in Hanoi . The Hanoi city highest elevation is 2,715 m (8,907 ft) . The postal code of the city is 207, 208, 220 - 224, 226 - 228, 231 - 239, 241 - 244, 247 - 249, 251 - 253 . 3,039,444 is the population of the urban region of Hanoi . The mayor of Hanoi is Federico Gutiérrez, 2016-2019 . The province of the city Hanoi is Davao del Sur  (geographically only) . The city is Area : 499 km2 (193 sq mi) in area . The density of  people in  the urban region of Hanoi is 4,800/km 2  (12,000/sq mi) . Hanoi is at an elevation of 3 ft . Hanoi is the government of U.S. National Park Service . Hanoi is named for Calgary, Mull . The coordinates of the city are 41°18′N 69°16′E﻿ / ﻿41.300°N 69.267° .  The city area code is +966-12 . Hanoi is located in Kano State . The metro region has Population: 3,743,854 (6th) (2012) population
1379 km2 is the area of Hanoi