As regards civic infrastructure (water, sewage, etc.), the area of Kolkata District is under the administration of the Kolkata Municipal Corporation. But other parts of the city's (that is, the KMC's) area, and of the city's suburban areas, belong to the districts of North 24 Parganas, South 24 Parganas, Howrah, Hooghly and Nadia.
Kolkata District is bordered by Howrah District, North 24 Parganas District and South 24 Parganas District.
The office of the Kolkata Collector is in B.B.D. Bag, north of the General Post Office.