B. Ranganathan is an Indian politician and has been a Member of the Legislative Assembly of Tamil Nadu. He was elected to the Tamil Nadu legislative assembly from Purasawalkam constituency as an Indian National Congress candidate in the 1991[1] and 1996 elections.[2] He was elected as a Dravida Munnetra Kazhagam candidate in 2001 election.[3] In 2006 election he was elected as M.L.A. for Villivakkam constituency.He was re-elected to Villivakkam constituency in 2016. He was a staunch opponent of AIADMK and their policies. He is very active in Kolathur ex-Purasai area and lives in Jawahar Nagar near Perambur. B. Ranganathan has a reputation for field work and his fights with the opponents in and outside the assembly. He was once a confidant of P. Chidambaram when in Congress but moved to DMK after Mr Chidambaram merged his Peravai with Congress.
| Elections | Constituency | Party | Result | Vote percentage | Opposition Candidate | Opposition Party | Opposition vote percentage | |||
|---|---|---|---|---|---|---|---|---|---|---|
| 1989 | Purasawalkam | AIADMK(J) | 22.07 | Arcot N. Veeraswami | DMK | 49.88 | ||||
| 1991 | Purasawalkam | INC | 39.68 | Arcot N. Veeraswami | DMK | 26.99 | ||||
| 1996 | Purasawalkam | TMC(M) | 70.61 | Gnanam. J. Kathipara | INC | 18.37 | ||||
| 2001 | Purasawalkam | DMK | 48.53 | Vetriivel P | TMC(M) | 45.89 | ||||
| 2006 | Villivakkam | DMK | 45.63 | G. Kalan | AIADMK | 40.70 | ||||
| 2016 | Villivakkam | DMK | 43.96 | Thadi M. Raju | AIADMK | 37.75 |