| A. Thiagarajan | |
| Office: | Member of the Madras State Assembly |
| Constituency: | Pudukkottai |
| Termstart: | 1962 |
| Termend: | 1967 |
| Predecessor: | V. Arunachala Thevar |
| Party: | Dravida Munnetra Kazhagam |
| Office1: | Member of the Madras State Assembly |
| Constituency1: | Thirumayam |
| Termstart1: | 1971 |
| Termend1: | 1976 |
| Predecessor1: | P. R. Ramanathan |
A. Thiagarajan is an Indian politician and former Member of the Legislative Assembly of Tamil Nadu. He was elected to the Tamil Nadu legislative assembly as a Dravida Munnetra Kazhagam candidate from Pudukottai constituency in the 1962 election and Tirumayam constituency in the 1971 election.[1] [2]