N. Viswanathan (1929 – 17 November 2010), popularly known as Calcutta Viswanathan in theTamil film industry, was an Indian actor and academic. A Tamilian by birth, he moved to Calcutta(now Kolkata) at a young age and joined St. Xavier's College, Calcutta as an English professor and continued to teach there for more than 40 years. Viswanathan was also a well-known public speaker. He started acting films after entering into the Bengali films by acting in Mrinal Sen'sPunascha and Satyajit Ray's Kanchenjungha.[2] In an acting career spanning over 40 years Viswanathan appeared in nearly 100 films in Bengali, Tamil and English. Viswanathan was a member several theatre groups and also formed the "Calcutta Players", an acting troupe
| Movie | Byatikrami | 2006-02-23 | |
| Movie | In the Forest... Again | 2003-05-03 | |
| Movie | Baba | Baba's Father | 2002-08-15 |
| Movie | Dialogue & Delirium | 1999-02-18 | |
| Movie | Enakkul Oruvan | 1984-10-23 | |
| Movie | Sagar Balaka | 1983-01-01 | |
| Movie | Saheb | 1981-10-02 | |
| Movie | Paka Dekha | 1980-08-01 | |
| Movie | Moodupani | Raghunath | 1980-11-06 |
| Movie | Moondru Mudichu | The unnamed widower | 1976-10-22 |
| Movie | Rodon Bhara Basanta | 1974-04-05 | |
| Movie | Ekhonee | 1971-04-30 | |
| Movie | Duti Mon | 1970-07-24 | |
| Movie | Anustup Chhanda | 1964-10-30 | |
| Movie | Barnali | Dr. Shaileshwar Ghosh | 1963-01-01 |
| Movie | Kanchenjungha | Bannerjee | 1962-05-11 |
| Movie | Over Again | Mr. Mukherjee | 1961-04-12 |