Oradiyampulam Somuthevar Manian, popularly known as O. S. Manian, is a member of the 15th Tamil Nadu Legislative Assembly from Vedaranyam constituency, Nagapattinam district. He is a staunch loyalist to AIADMK Supreme J Jayalalithaa. He previously represented the Mayiladuthurai (Lok Sabha constituency) of Tamil Nadu and is a member of the All India Anna Dravida Munnetra Kazhagam political party.
J Jayalalithaa appointed O.S Manian as Minister for Handlooms and Textiles in May 2016. This was his first cabinet post in the Government of Tamil Nadu.
He has been interested in politics and public interest since his youth. From the age of 18 he joined the All India Anna Dravida Munnetra Kazhagam.
Later, he held many party responsibilities such as Union Secretary, Club Policy Propagation Secretary, District Club Secretary.
Manian has completed formal education only till XII standard. An agriculturist by profession, he has held various political offices since 1995. Manian belongs to the Agamudayar community and currently serves as the AIADMK District Secretary for Nagapattinam.