S. D. Sundharam also written as S. D. Sundaram, (22 July 1921 – 10 March 1979) was an Indian Tamil playwright, dialogue writer and lyricist.

[2] He mastered memorising Tamil poetries such as Athichoodi, Konrai Vendhan, Pattinathar songs and Vallalar's Thiruarudpa.

Observing his proficiency in Tamil literature, Nawab Rajamanickam admitted him to the State College of Arts in Tiruvaiyaru.

[2] He produced and directed a documentary film titled Singanaadham Kedkudhu, Cheena Nagam Odudhu during the India - China war of 1962.

[2] He also published a monthly magazine titled Ulaga Naadagam (English: World Drama) from 1977[2] He participated in the Vividh Bharati's Thaen Kinnam (Tamil: தேன் கிண்ணம்) program produced by All India Radio, Chennai Station on 8 March 1979.