Greater Chennai Corporation (GCC) is a local government for the City of Chennai in the Chennai Metropolitan Area of Tamil Nadu, India. Inaugurated on 29 September 1688, under a royal charter issued by King James II of England on 30 December 1687 as the Corporation of Madras, it is the oldest municipal body of the Commonwealth of Nations outside Great Britain. It is the largest municipal corporation in Tamil Nadu with an area of 426 km2. It is headed by a mayor, who presides over 200 councillors, each of whom represents one of the 200 wards of the city. It is the second oldest corporation in the world after the City of London. The city limits, which had been expanded several times over the years, is currently coterminous with the Chennai district. It is one of the four municipal corporations located within the Chennai Metropolitan Area, the other three being the Tambaram Corporation, Avadi City Municipal Corporation and Kanchipuram Municipal Corporation.

Chennai, formerly known as Madras, is the capital city of Tamil Nadu, the southernmost state of India. It is the state's primate city and is located on the Coromandel Coast of the Bay of Bengal. According to the 2011 Indian census, Chennai is the sixth-most populous city in India and forms the fourth-most populous urban agglomeration. Incorporated in 1688, the Greater Chennai Corporation is the oldest municipal corporation of India and the second oldest in the world after London.