Shanmuganathan may refer to
Shanmuganathan Ravishankar, LTTE Head of Intelligence Kuhan Shanmuganathan, Malaysian field hockey player S. Shanmuganathan (Sri Lankan politician) V. Shanmuganathan, Governor of Meghalaya S. P. Shanmuganathan, Indian politician S. Shanmuganathan (Indian politician) S. Shanmuganathan (Sri Lankan politician) Shanmuganathan Dillidurai, Indian murder victim in Singapore
See also Karampon Shanmuganathan Maha Vidyalayam, School in Karampon, Sri Lanka.