The city province is Razavi Khorasan . The mayor of Derby is Ravinder Bhalla (term ends December 31, 2021) . The city Derby demonym is Indori . The density of  residents in  the urban region of Derby is 2,300/km 2  (6,100/sq mi) . The area of the city is 89.63 sq mi (232.14 km 2 ) . Derby is located in Miami-Dade, Monroe, & Collier counties, Florida, United States . The area of the urban region is 335.4 sq mi (539.7 km 2 ) . Derby is the government of National Park Service .  The city area code is (0)2 . The density of  inhabitents in Derby is 280/km 2  (740/sq mi) . 4,484/km 2  (11,610/sq mi) is the density of residents in  the metro region of Derby . The land area of the city is 39.28 sq mi (101.74 km 2 ) . On December 23, 1814 (village) the city was incorporated . The metro region is Area: 2,768 km2 (1,068.7 sq mi) in area . This city is named after Society of the Cincinnati . The postal code of the city is 21500 . Derby is at an elevation of 2250 m . The coordinates of the city are 12°8′11″N 86°15′5″W﻿ / ﻿12.13639°N 86.25139°W . The Derby citys' lowest elevation is 190 m 
The city Derby is located in Razavi Khorasan province