The Douala citys' lowest elevation is 75 m  . This city is named after Confluence of Grand River and Gunnison River . 464.71/km 2  (1,203.6/sq mi) is the density of residents in  the urban region of Douala . 1,592,492 (2016 Census) is the population of the urban region of Douala .  The city area code is +55 (41) . The density of  residents in Douala is 9,821/km 2  (25,436/sq mi) (2017) . On March 6, 1836 (city) the city was incorporated . Douala is located in People's Republic of China . The city province is Jilin . 15°15′S 166°50′E / 15.250°S 166.833°E are the coordinates of the city. . The Douala city highest elevation is 14,110 ft (4,300 m) . Douala is at an elevation of 700 ft . The density of  inhabitents in  the metro region of Douala is 2,200/km 2  (5,700/sq mi) . Douala is the government of Ministry of Culture . The population of the metro region is 5,274,321 (2014-urban, others 2013) . The city land area is 48.42 sq mi (125.41 km 2 ) . The city water area is 28.08 km 2  (10.84 sq mi) . Faud al Muhammed Sisi is the mayor of Douala . The city has the postal code 130000
+55 (41) is a prefix required to call a number in Douala