Kethesh Loganathan (full name Ketheeswaran Loganathan, 1952–12 August 2006) was a Sri Lankan Tamil political activist, a Human Rights advocate and deputy secretary general of the Secretariat for Coordinating the Peace Process (SCOPP). He was among the fiercest critics of the separatist Liberation Tigers of Tamil Eelam (LTTE), which was widely blamed for his death. The group has neither accepted nor denied responsibility for his assassination.