The city was incorporated in 1799 (Guyandotte) . 2,200/km 2  (5,700/sq mi) is the density of residents in  the metro region of Derby . The density of  people in  the urban region of Derby is 7,500/km 2  (19,000/sq mi) . Derby is located in Magelang, Central Java . The urban region is 335.4 sq mi (539.7 km 2 ) in area . The land area of the city is 225.73 sq km  (87.15 sq mi) . Derby is named for Rao Jodha . The demonym of the city Derby is Santiaguinos  (- as ) . The highest elevation of Derby is 91 m (299 ft) . The city water area is 0.37 sq mi (0.95 km 2 ) . The postal code of the city is 9XXXXXX . The city is 68.17 sq mi (176.56 sq km) in area . Derby is at an elevation of 6 m . The city Derby province is Sichuan . The density of  residents in Derby is 850/km 2  (2,200/sq mi) . 8°3′S 34°54′W﻿ / ﻿8.050°S 34.900°W are the coordinates of the city. . The lowest elevation of Derby is 190 m  . Kakha Kaladze is the mayor of Derby . +82-53 is the area code of Derby
There are 7660 people per sq km in the urban region of Derby