The Tamil Nadu Public Service Commission (TNPSC) is a department of the government of Tamil Nadu that is responsible for governing the recruitment of personnel into the state's public service.It is the successor of the Madras Service Commission, which came into being under an Act of the Madras Legislature in 1929 and was the first Provincial Public Service Commission in India. It adopted its current name in 1970.

TNPSC operates under Articles 315 to 323 of Part XIV of the Constitution of India. The commission is required to advise the Government on all matters relating to framing of recruitment rules, principles to be followed in making appointments and promotions and transfers from one service to another service, in respect of disciplinary matters affecting government servants and to conduct examinations for selection of candidates under direct recruitment to the State, Subordinate and Ministerial Services.

The commission conducts departmental examinations for government servants and conducts the examination on behalf of the national Ministry of Defence for admission to the school run by the Rashtriya Indian Military College, Dehra Dun.