Derby City Council is the local authority for Derby, a unitary authority with city status in the East Midlands region of England.

As a unitary authority, Derby City Council is responsible for all services within its boundary and is therefore distinct from the two-tier system of local government that exists in the surrounding county of Derbyshire. Outside the city, responsibility is shared between Derbyshire County Council and various district or borough councils.

The town of Derby had been an ancient borough, with borough charters dating back to 1154.^[3] It was reformed to become a municipal borough in 1836 under the Municipal Corporations Act 1835, governed by a corporate body called "the mayor, aldermen and burgesses of the borough of Derby", generally known as the corporation or town council. When elected county councils were established in 1889 under the Local Government Act 1888, Derby was considered large enough to provide its own county-level services and so it was made a county borough, independent from the surrounding Derbyshire County Council.^[4]

In 1974 Derby was reconstituted as a non-metropolitan district under the Local Government Act 1972; it kept the same boundaries but became a lower-tier district council with Derbyshire County Council providing county-level services to the town for the first time.^[5] Derby retained its borough status, allowing the chair of the council to take the title of mayor, continuing Derby's series of mayors dating back to 1638.^[6] The borough of Derby was awarded city status on 7 June 1977, allowing the council to change its name to Derby City Council.^[7]

Derby became a unitary authority on 1 April 1997, regaining its independence from Derbyshire County Council.^[8] The city remains party of the ceremonial county of Derbyshire for the purposes of lieutenancy.^[9]

Derby City Council provides all local government services in the area. As a unitary authority it provides both county-level and district-level services. There are no civil parishes in Derby, which is an unparished area.^[10]

The council is based at the Council House on Corporation Street, which was purpose-built for the council. Construction began in 1938 but was interrupted by the Second World War, with the building eventually being completed in 1949.^[17]

Since the last boundary changes in 2023 the council has comprised 51 councillors, representing 18 wards, with each ward electing two or three councillors. Elections are held every four years.^[18]