Jayakumar Jayavardhan (born 29 May 1987) known as J. Jayavardhan is an Indian politician and was a Member of Parliament elected from Tamil Nadu. He was elected to the Lok Sabha from Chennai South constituency as an All India Anna Dravida Munnetra Kazhagam candidate in 2014 election. He completed his undergraduate studies at Sri Ramachandra Medical College and Research Institute and is a doctor by profession. Dr J Jayavardhan has become the youngest MP in India by winning the seat from South Chennai, Tamil Nadu at the young age of 26.[[[Dushyant Chautala#{{{section}}}|contradictory]]]

His father D. Jayakumar is a former MLA in Royapuram constituency Chennai and Former minister of fisheries in ADMK government and was also Speaker of the Tamil Nadu Assembly for a year (2011 – 2012), besides being the minister for fisheries in the first J. Jayalalithaa government of 1991–1996.

Elections contested

Lok Sabha Elections

ElectionsConstituencyPartyResultVote percentageOpposition candidateOpposition partyOpposition vote percentage
2014 Indian general electionChennai SouthAIADMKWon41.34T. K. S. ElangovanDMK28.44
2019 Indian general electionChennai SouthAIADMKLost26.94Thamizhachi ThangapandianDMK50.28
2024 Indian general electionChennai SouthAIADMKLost26.44Thamizhachi ThangapandianDMK47.02