P. R. Senthilnathan (born 1968) is a politician from Tamil Nadu.

He was born in Nagadi village in the Sivaganga district.

He was appointed Sivaganga district secretary of AIADMK in April 2013, and Chairman of Tamil Nadu Backward Classes and economic development corporation in June 2013.

[1][2] In 2014 he was announced as Sivaganga Loksabha candidate by the Party Head Honourable Chief Minister Jayalalithaa.

With a difference of 229,385 votes in the 2014 Loksabha election he defeated H. Raja, the Tamil Nadu BJP Vice President and Karthi P. Chidambaram, (son of P. Chidambaram, the country's former Finance Minister),[3] winning his party the election for the first time in 34 years in Sivaganga constituency.