The civic administration of Kolkata is executed by several government agencies, and consists of overlapping structural divisions. Kolkata's administrative agencies have areas of jurisdiction that do not coincide.
Governing bodies
At least four administrative definitions of the city are available; listed in ascending order of area, those are:
The area within which the Kolkata Municipal Corporation functions also has the following authorities involved in administration: the KMC itself, the Kolkata Collector, the Kolkata Police and the District Magistrate of South 24 Parganas District. The Kolkata Collector collects land revenues in Kolkata district, the area which is administered by the KMC. In 2011, Kolkata Police underwent restructuring and as of 2012, the Kolkata Police area is slightly bigger than Kolkata Municipal Area. It may seem paradoxical that a municipal area should be a subset of one urban area, since normally a district contains numerous urban areas as well as rural areas. This and the various other complications of Kolkata's government are mostly explained by the fact that Kolkata's gradual urban sprawl had somehow to be accommodated to existing political boundaries. The KMC's entire area comprises all 144 wards of the KMC. "City" in relation to Kolkata normally refers to the KMC area.
Kolkata Municipal Corporation
The Kolkata Municipal Corporation, or KMC, oversees and manages the civic infrastructure of the city's 15 boroughs, which together encompass 144 wards. Each ward elects a councillor to the KMC. Each borough has a committee of councillors, each of whom is elected to represent a ward. By means of the borough committees, the corporation undertakes urban planning and maintains roads, government-aided schools, hospitals, and municipal markets. As Kolkata's apex body, the corporation discharges its functions through the mayor-in-council, which comprises a mayor, a deputy mayor, and ten other elected members of the KMC. The functions of the KMC include water supply, drainage and sewerage, sanitation, solid waste management, street lighting, and building regulation. The city also has an apolitical titular post, that of the Sheriff of Kolkata. The Sheriff presides over various city-related functions and conferences. In 2011, it was announced that Kolkata Police and Kolkata Municipal Corporation area will be almost coterminous. In 2012, erstwhile Joka-I & Joka-II Gram Panchayats were added to municipal limits. This addition increases the area of KMC to.
Another ancillary civic body is the Kolkata Metropolitan Development Authority responsible for the statutory planning and development of the Kolkata Metropolitan Area. The KMA includes a large suburban hinterland around the urban centres of Kolkata.