The Department of Public is one of the departments of Government of Tamil Nadu.

The department functions under the direct control of the Chief secretary and deals with essential matters concerning the administration of the state.

[1] It is responsible for the following: functioning of Governor's household, appointment of ministers, establishment of office of chief minister and ministers, arrangements for cabinet meetings, protocol and arrangements for visits of VVIPs, managing aviation wing of the government, liaison between Government of India and state government, liaison with Ministry of External Affairs and foreign consulates, postings of IAS officers, constitution of commissions of inquiry, human rights, administration of government guest houses, welfare of ex-servicemen, freedom fighters welfare, relief to Sri Lankan Tamils, welfare of non-resident Tamils, declaration of public holidays, population census, Management of Chief Minister’s special cell, arrangements for the celebration of national functions, recommendations to Government of India for awards, permission for entry and exit to foreign nationals.

[1][2] The following bodies function under the purview of the department:[2][3]