Chennai South Lok Sabha constituency was established in 1951. According to a report by Citizen Matters, Chennai South is a cosmopolitan constituency that is crying out for better infrastructure. The report suggests that the constituency has been a traditional stronghold of the Dravida Munnetra Kazhagam (DMK) and the All India Anna Dravida Munnetra Kazhagam (AIADMK) in recent years.
- In the 2019 Lok Sabha elections, Dr. T. Sumathy of the DMK won the seat by defeating the Bharatiya Janata Party (BJP) candidate Dr. Tamilisai Soundararajan with a margin of 3,77,198 votes.
- There is not much information available on the long-term historical political trend of Chennai South constituency. However, according to a report by India Today, the DMK and the AIADMK have been the dominant parties in Tamil Nadu politics for several decades.
- The current Members of Legislative Assembly (MLAs) from the Chennai South constituency are as follows: Virugampakkam, Saidapet, Thiyagarayanagar, Mylapore, Velachery, and Shozhinganallur.
Overall, it seems that Chennai South has been a traditional stronghold of the DMK and the AIADMK in recent years. However, there is not enough information available to determine any long-term historical political trend in the constituency.