SRD Vaidyanathan (Tamil: SRD.வைத்தியநாதன்; 15 March 1929 − 18 November 2013)[1] was an Indian musician who played the Nadaswaram.

His grandfather Ramasamy Pillai’s Nagaswaram performance was recorded by His Master’s Voice and his father Dakshina Murthy also made a record for the Colombia company.

He has also worked as Reader in Nagaswaram in Annamalai University (Chidambaram) and Retd.

Reader in Nagawasram Tamil Isai Sangam, Raja Annamalai Mandram, Chennai.

Many concerts were relayed by All India Radio (AIR) stations and he was the top grade Vidwan list and acted as member in Audio-visual Board of AIR.