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