Jean-Étienne-Marie Portalis (1 April 1746 – 25 August 1807) was a French jurist and politician in time of the French Revolution and the First Empire. His son, Joseph Marie Portalis, was a diplomat and statesman.
Portalis was born at Le Beausset, currently in the Var département of Provence, France to a bourgeois family, and was educated by the Oratorians at their schools in Toulon and Marseille, and then went to the University of Aix. As a student, he published his first two works, Observations sur Émile (on Jean-Jacques Rousseau's Emile: Or, On Education) in 1763 and Des Préjugés in 1764.
In 1765 he became a lawyer at the parlement of Aix-en-Provence, and soon obtained so great a reputation that he was instructed by Étienne François de Choiseul in 1770 to draw up the decree authorizing the marriage of Protestants. From 1778 to 1781, Portalis was one of the four assessors or administrators of Provence.
In November 1793, after the First French Republic had been proclaimed, he came to Paris and was thrown into prison for being the brother-in-law of Joseph Jérôme Siméon, the leader of the Federalists in Provence. He was soon released to a maison de santé, where he remained until the fall of Maximilien Robespierre during the Thermidorian Reaction.