- Source: Natham R. Viswanathan
- Natham R. Viswanathan
- Natham Assembly constituency
- Edappadi K. Palaniswami
- O. Panneerselvam
- Tamil Nadu Legislative Assembly
- M. K. Stalin
- List of general secretaries of the All India Anna Dravida Munnetra Kazhagam
- T. T. V. Dhinakaran
- All India Anna Dravida Munnetra Kazhagam
- 2021 Tamil Nadu Legislative Assembly election
Natham R. Viswanathan (born 11 December 1949) is an Indian politician and deputy general secretary of All India Anna Dravida Munnetra Kazhagam. He is a member of the Tamil Nadu Legislative Assembly from Natham Constituency. He was the Minister for Electricity and Prohibition and Excise, Govt. of Tamil Nadu. Previously, he was elected to the Tamil Nadu legislative assembly as an Anna Dravida Munnetra Kazhagam candidate from Natham constituency in 1999 after the death of then legislative member of Natham, M. Andi Ambalam. He has won consecutively in 2001, 2006 and 2011 elections in a landslide vote count and has a cult following.