Luis Moreno-Ocampo (born 4 June 1952) is an Argentine lawyer who has been the Prosecutor of the International Criminal Court (ICC) since 16 June 2003. He previously worked as a prosecutor in Argentina, famously combating corruption and prosecuting human rights abuses by senior military officials. He has also lectured in criminal law and practiced law privately.

Moreno-Ocampo graduated from the University of Buenos Aires Law School in 1978, and from 1980 to 1984 he worked as a law clerk in the office of the Solicitor General.

From 1984 to 1992, Moreno-Ocampo worked as a prosecutor in Argentina. He first came to public attention in 1985, as Assistant Prosecutor in the "Trial of the Juntas"—the first time since the Nuremberg Trials that senior military commanders were prosecuted for mass killings. Nine senior commanders, including three former heads of state, were prosecuted and five of them were convicted. He served as District Attorney for the Federal Circuit of the City of Buenos Aires from 1987 to 1992, during which time he prosecuted the military commanders responsible for the Falklands War, the leaders of two military rebellions, and dozens of high-profile corruption cases. In 1987, he helped United States prosecutors extradite General Guillermo Suárez Mason to Argentina.