The Thoothukkudi City Municipal Corporation (abbr. TCMC; Tamil: தூத்துக்குடி மாநகராட்சி, IAST: Tūttukkuṭi mānakarāṭci) is the governing civic body of Thoothukkudi, the sea gate of the southern Indian state of Tamil Nadu. It was established by the Government of Tamil Nadu under the Thoothukkudi City Municipal Corporation Act, 2008 (Tamil Nadu Act 27 of 2008). The corporation is responsible for the civic infrastructure and administration of the city and some suburbs. The corporation consists of a legislative and an executive body. The corporation consists of a legislative and an executive body, which is headed by the mayor and assisted by a deputy mayor, while the executive body is headed by a commissioner of the corporation. It consists of 60 wards within the city's limits.

The headquarters of the corporation is located near Perunthalaivar Kamarajar Market at Tamizh Salai, Thoothukkudi.

Thoothukkudi City Municipal Corporation is one of the 21 municipal corporations in the state of Tamil Nadu. Thoothukkudi was constituted as a municipality as per the Town Improvement Act of 1865 on 1 November 1866.^[1] It upgraded the status of municipal corporation on 5 August 2008 after 142 years of being a municipality in view of rapid increase in population and extension of administrative boundaries.

The jurisdiction of Thoothukkudi City Municipal Corporation has been extended in May 2011, to include the areas of the city Corporation, 3 Municipalities, 17 Town Panchayats and 11 Village Panchayats located around the corporation. Consequent to this extension, the total area of the corporation has increased considerably from 13.47 km². to 90.66 km². and the numbers of the wards have increased from 51 to 60. The extended Municipal Corporation had a population of 3,72,408 as per 2011 census.

Zones of Thoothukkudi Municipal Corporation are

• Thoothukkudi North
• Thoothukkudi East
• Thoothukkudi West
• Thoothukkudi South