S. Ramachandran may refer to:
S. Ramachandran (filmmaker), Indian film journalist and director S. Ramachandran (scientist) (1934–2016), Indian biotechnologist S. M. Ramachandran, Indian politician in Tamil Nadu Srinivasan Ramachandran, Indian bioinformatician Subramaniam Ramachandran, missing Sri Lankan Tamil journalist N. S. Ramachandran (1908–?), Indian composer of Carnatic music Panruti S. Ramachandran (born 1937), Indian politician in Tamil Nadu V. S. Ramachandran (born 1951), Indian-American neuroscientist S. Ramachandran Pillai (born 1938), Indian communist politician from Kerala S. Ramachandran. Indian politician in Tamil Nadu