Silvia Alejandra Fernández de Gurmendi (born 24 October 1954) is an Argentine lawyer, diplomat and judge.

[2][3] In 2020 she was elected to serve as President of the Assembly of States Parties to Rome Statute of the International Criminal Court for the twentieth to twenty-second sessions (2021-2023).

[5] She served as presiding judge when the ICC rejected Libya's request to annul the international arrest warrant for Saif al-Islam Gaddafi, ruling that the Libyan government was not yet capable of holding a fair trial by itself and it is obliged under international law to hand him over to the ICC.

[5] In August 2015, Fernández decided to reopen a hearing into whether to take action against Kenya over allegations it obstructed investigations into its President Uhuru Kenyatta, arguing that the appeals chamber had failed to properly assess the role of prosecutors and that errors prevented it "from making a conclusive determination".

She is a member of the Crimes Against Humanity Initiative Advisory Council, a project of the Whitney R. Harris World Law Institute at Washington University School of Law in St. Louis to establish the world’s first treaty on the prevention and punishment of crimes against humanity.