Jean Ousset (28 July 1914 – 20 April 1994) was a French ideologist of National Catholicism born in Porto, Portugal.
He was an activist of the Action française monarchist movement in the 1930s, and personal secretary of its leader, Charles Maurras.
The Cité catholique also included Marcel Lefebvre, who later founded the priestly Society of St. Pius X, free from neo-modernist and indifferentist currents.
As the Cagoule had done before the war, the Cité catholique had as aim to infiltrate the Republic's elites in order to form a National Catholic state, on the model of Francoist Spain.
Ousset also wrote Le Marxisme-Léninisme in which he developed the new concept of "subversion" and argued that Marxists could only be combatted by "a profound faith, an unlimited obedience to the Holy Father, and a thorough knowledge of the Church's doctrines.".