| Thomas Sydney Smith | |
| Order1: | Advocate-General of Madras Presidency |
| Term Start1: | 1861 |
| Term End1: | 1863 |
| Successor1: | John Bruce Norton |
| Profession: | Advocate-General |
Thomas Sydney Smith was an Indian lawyer who served as the Advocate General of Madras Presidency (now known as Tamil Nadu, India) from 1861 to 1863.[1] He was ex-officio a member of the Madras Legislative Council.