Jean-Louis Laya (4 December 1761, Paris – 25 August 1833, Meudon) was a French playwright. He wrote his first comedy in collaboration with Gabriel-Marie Legouvé in 1785. The piece, however, though accepted by the Comédie française, was never represented. In 1789 he produced a plea for religious toleration in the form of a five-act tragedy in verse, Jean Calas. In his next work, the injustice of the disgrace cast on a family by the crime of one of its members formed the theme of Les Dangers de l'opinion (1790).
It is by his Ami des lois (1793) that Laya is best remembered. This energetic protest against mob rule, with its scarcely veiled characterizations of Robespierre as Nomophage and of Marat as Duricrne, was an act of the highest courage, for the play was produced at the Théâtre Français (temporarily Théâtre de la Nation) only nineteen days before the execution of Louis XVI.
Ten days after its first production the piece was prohibited by the Commune, but the public demanded its representation; the mayor of Paris was compelled to appeal to the National Convention, and the piece was played while some 30,000 Parisians guarded the hall. Laya went into hiding, and several persons convicted of having a copy of the play in their possession were guillotined.
At the end of the Terror Laya returned to Paris. In 1813 he replaced Delille in the Paris chair of literary history and French poetry; he was admitted to the Académie française in 1817. Laya produced in 1797 Les Deux Stuarts, and in 1799 Falkland, the title-role of which provided Talma with one of his finest opportunities. Laya's works, which chiefly owe their interest to the circumstances attending their production, were collected in 1836–1837. His son, Léon, was also a playwright.