| St. Thomas Mount | |
| Constituency No: | 16 |
| Type: | SLA |
| State: | Tamil Nadu |
| District: | Chingleput |
| Established: | 1967 |
| Abolished: | 1976 |
| Reservation: | None |
The St. Thomas Mount Assembly constituency was one of the 234 state legislative assembly constituencies in Tamil Nadu, a state in southern India. It was in existence for the 1967 and 1971 assembly elections. At that time, this constituency was represented only by the former chief minister of Tamil Nadu M. G. Ramachandran. Later, it was merged with the Alandur assembly constituency from the 1977 assembly election.
| No. | Name | Term of office | Assembly | Political party | ||
|---|---|---|---|---|---|---|
| Assumed office | Left office | |||||
| 1 | M. G. Ramachandran (1917–1987) | 15 March 1967 | 5 January 1971 | 4th | Dravida Munnetra Kazhagam | rowspan=2 |
| 22 March 1971 | 14 October 1972 | 5th | ||||
| 17 October 1972 | 31 January 1976 | All India Anna Dravida Munnetra Kazhagam | ||||