C.N.Visvanathan (born 28 April 1947) or Chetpet Natarajan Visvanathan was an Indian politician from the All India Anna Dravida Munnetra Kazhagam.
Visvanathan joined the All India Anna Dravida Munnetra Kazhagam at an early age. In 1977, he stood for election from Thirupattur Lok Sabha constituency and was elected to the Lok Sabha or lower house of the Indian Parliament.