The coordinates of the city are 35°50′08″N 51°00′37″E﻿ / ﻿35.83556°N 51.01028°E . The area of the city is 47.84 sq mi (123.90 km 2 ) . The Hanoi city highest elevation is 241.9 m (793.6 ft) . The city land area is 314.95 sq mi (815.72 km 2 ) . The city was incorporated in February 17, 1909 . 2,700/km 2  (7,000/sq mi) is the density of people in Hanoi . Area: 713 km2 (275 sq mi) is the area of the urban region of Hanoi . Hanoi is at an elevation of 0 meters . This city is named after Christopher Columbus . The city Hanoi demonym is Catanesi . The water area of the city is 21 km 2  (8 sq mi) . 464.71/km 2  (1,203.6/sq mi) is the density of residents in  the urban region of Hanoi . Population (2019): 2,700,000 is the population of the metro region of Hanoi . The postal code of the city is 34000 to 34990 . 2,813/km 2  (7,290/sq mi) is the density of inhabitents in  the metro region of Hanoi . The lowest elevation of Hanoi is 2 m  . Ravinder Bhalla (term ends December 31, 2021) is the mayor of Hanoi
There is more land area than water covered area in Hanoi