Jean-Marc Théolleyre (31 July 1924 – 12 June 2001) was a 20th-century French journalist.

• 1943: Resistant in Lyon and then in Toulouse, he was arrested and deported to Buchenwald for nearly two years and was released in 1945.
• November 1945: joined Le Monde as reporter. Professional card #6312.
• 1950-1957: Judicial Chronicler in Le Monde. During this period he followed some of the great post-war trials like that of Amélie Rabilloud, Marie Besnard, Oradour-sur-Glane, the Dominici affair, and Jacques Fesch.
• April 1957 – November 1957: Senior reporter for Le Figaro littéraire.
• November 1957: Senior reporter for Paris-Journal.
• 1959: Retuened to Le Monde, a chief reporter and a judicial columnist. He covered trials linkes to the Algerian war as well as the réseau Jeanson, general Salan, the Semaine des barricades [fr], and attentat du Petit-Clamart [fr].
• 1970-75: Permanent envoy for the Rhône-Alpes region.
• From 1975: Literary critic and senior reporter in charge of the judicial chronicle.
• 1967: Vice-President of the Association of the Judicial Press.
• In 1987, he covered for Le Monde the trial in Lyon of Klaus Barbie.

• Prix Albert Londres (1959)
• Prix Louis Hachette for the print media (1988) for his paper "Klaus Barbie: nothing to say" (Klaus Barbie: rien à dire) (Le Monde).

Jean-Marc Théolleyre was convicted in 1983 by the Paris Court of Appeal for defamation, having suggested in his book Les néo-nazis (ed. Messidor, 1982) that "Jean-Marie Le Pen professed neo-Nazi opinions". The Court's judgment, inter alia, stated that "he did not exercise the caution, reserve and objectivity required by amalgamating or insinuating" (Paris Court of Appeal, 15 June 1983).

• 1956: Le Procès des fuites
• 1966: Ces Procès qui ébranlèrent la France
• 1977: Tout condamné à mort aura la tête tranchée
• 1982: Les néo-nazis
• 1991: L'accusée: 45 ans de justice en France, 1945-1990
• 1998: Les médias et la justice (with Henri Leclerc)

• Hommage sur le blog "Chroniques judiciaires" de P. Robert-Diard Archived 29 April 2008 at the Wayback Machine
• Jean-Marc Théolleyre, mort d'un Juste on Libération (15 June 2001)
• Jean-Marc Théolleyre incarnait une haute idée du journalisme on La Croix
• Jean-Marc Théolleyre, l’observateur engagé (1945-1965) on CAIRN
• Jean-Marc Théolleyre on Babelio