2,305/km 2  (5,970/sq mi) is the density of inhabitents in  the urban region of Christchurch . The city water area is 3.4 sq mi (8.8 sq km) . 1,371.76 km 2  (529.64 sq mi) is the area of the metro region of Christchurch . Takele Uma Benti is the mayor of Christchurch . The area of the city is Area : 22,142 km2 (8,549 sq mi) . On 1842 the city was incorporated . The postal code of the city is 34000 to 34990 . The Christchurch citys' lowest elevation is 75 m  . The density of  inhabitents in  the metro region of Christchurch is 662.1/km 2  (1,715/sq mi) . The Christchurch city highest elevation is 241.9 m (793.6 ft) . The demonym of the city Christchurch is Tbilisian , Tbilisite . Christchurch is at an elevation of 990 m . The coordinates of the city are 7°36′29″S 110°12′14″E﻿ / ﻿7.608°S 110.204°E﻿ / -7.608; 110.204 . The urban region is 2,122 sq mi (5,496 sq km ) in area . Christchurch is named for Confluence of Grand River and Gunnison River . Christchurch is the government of Parks Canada . The province of the city Christchurch is Lusaka Province . +57 2 is the area code of Christchurch . The density of  residents in Christchurch is 7,400/km 2  (19,000/sq mi) . Christchurch is located in United States
The location of the city is  longitude by 7.608°S latitude