This city is named after Confluence of Grand River and Gunnison River . The highest elevation of Tbilisi is 241.9 m (793.6 ft) . The metro region has 6,310,000 (2017) population . 775 is the area code of Tbilisi . The city Tbilisi demonym is Alexandrian, Alexandrine (Arabic: إسكندراني‎) . The water area of the city is 28.08 km 2  (10.84 sq mi) . The postal code of the city is 9XXXXXX . The density of  inhabitents in  the urban region of Tbilisi is 4,800/km 2  (12,000/sq mi) . Tbilisi is located in South Korea . The city Tbilisi province is Sindh . The population of the urban region is Population: 3,160,000 (2006) . The Tbilisi citys' lowest elevation is 378 m  . The city land area is 16.0 sq mi (41.4 km 2 ) . Tbilisi is at an elevation of 22 m . On July 22, 1882 the city was incorporated . Tbilisi is the government of National Park Service . The mayor of Tbilisi is Ken Christian . 17,000/sq km (43,000/sq mi) is the density of residents in Tbilisi . The density of  residents in  the metro region of Tbilisi is 2,200/km 2  (5,700/sq mi) . The coordinates of the city are 39°12′45.05″N 140°53′11.217″E﻿ / ﻿39.2125139°N 140.88644917°E﻿ / 39.2125139; 140.88644917
There are less than 4764 residents per km 2 in the urban region of Tbilisi