Venkatesan Sundarajan Rajan (1934 – 15 July 1983) was a Singaporean dermatologist and the medical superintendent of the Middle Road Hospital.
He was especially known for his teaching, research, and public health organizational work in venereal disease, especially gonorrhea, as well as dermatology.
As the superintendent of the hospital, he was instrumental in the establishment of facilities and services for mycology, dermatopathology and immunodermatology, which advanced the field of dematology in Singapore.
In 1982, he became an associate professor of dermatology and venereal diseases at the National University of Singapore.
[5][6] On the first anniversary of his death, the Singapore Indian Fine Arts Society staged a musical recital in his memory.