Jean Duvernoy (1st of January 1917 – 19th of August 2010, Saint-Jean de Luz) was a French medievalist.
Born in 1917 in Bourgoin to a Protestant family, he began to study the Waldensians and later Catharism.
He edited and translated a great number of sources, including Jacques Fournier's inquisition register, from which the French historian Emmanuel Le Roy Ladurie extracted Montaillou: The Promised Land of Error.