Shanmugalingam () is a surname and given name, commonly used in Sri Lanka. Notable people with the name include:
Surname: Kulanthai Shanmugalingam (1931–2025), Sri Lankan Tamil theatre artist and playwright N. Shanmugalingam, Sri Lankan Tamil sociologist Jo Shanmugalingam, British civil servant
Given name: Pottu Amman (Tamil militant) (Shanmugalingam Sivashankar), a Sri Lankan Tamil rebel