850/km 2  (2,200/sq mi) is the density of inhabitents in Derby . The density of  residents in  the metro region of Derby is 2,200/km 2  (5,700/sq mi) . Derby is located in Magelang, Central Java . The city was incorporated in 1799 (Guyandotte) . The highest elevation of Derby is 91 m (299 ft) . The demonym of the city Derby is Santiaguinos  (- as ) . The water area of the city is 0.37 sq mi (0.95 km 2 ) . Kakha Kaladze is the mayor of Derby . The lowest elevation of Derby is 620 ft . Derby is at an elevation of 20 ft . The density of  people in  the urban region of Derby is 7,500/km 2  (19,000/sq mi) . 8°3′S 34°54′W﻿ / ﻿8.050°S 34.900°W are the coordinates of the city. . The city has the postal code 9XXXXXX . This city is named after Rao Jodha . The city province is Sichuan . The urban region is 335.4 sq mi (539.7 km 2 ) in area . The city is 68.17 sq mi (176.56 sq km) in area . The city land area is 225.73 sq km  (87.15 sq mi) .  The city area code is +82-53
Land covers225.73 sq km area of the city