Olufemi Elias is a Nigerian lawyer who served as Registrar of the United Nations International Residual Mechanism for Criminal Tribunals (IRMCT) until 30 June 2020.

The International Residual Mechanism for Criminal Tribunals (IRMCT), also known simply as the Mechanism, is an international court established by the United Nations Security Council in 2010 to perform the remaining functions of the International Criminal Tribunal for the former Yugoslavia (ICTY) and the International Criminal Tribunal for Rwanda (ICTR) following the completion of those tribunals' respective mandates. It is based in both Arusha, Tanzania and The Hague, Netherlands.