The postal code of the city is 9XXXXXX . The density of  residents in  the metro region of Derby is 2,200/km 2  (5,700/sq mi) . The urban region is 335.4 sq mi (539.7 km 2 ) in area . The density of  residents in Derby is 850/km 2  (2,200/sq mi) . 7,500/km 2  (19,000/sq mi) is the density of inhabitents in  the urban region of Derby . The city water area is 0.37 sq mi (0.95 km 2 ) . The city was incorporated in 1799 (Guyandotte) . The Derby city highest elevation is 91 m (299 ft) . The city Derby province is Sichuan . 8°3′S 34°54′W﻿ / ﻿8.050°S 34.900°W are the coordinates of the city. . This city is named after Rao Jodha . 68.17 sq mi (176.56 sq km) is the area of the city namedDerby . Derby is located in Magelang, Central Java . +82-53 is the area code of Derby . Derby is at an elevation of 6 m . The city Derby demonym is Santiaguinos  (- as ) . The lowest elevation of Derby is 620 ft . Kakha Kaladze is the mayor of Derby . The land area of the city is 225.73 sq km  (87.15 sq mi)
The area of this city is less than  6 sq mi