Jean Séguy (born 3 May 1925, died on 11 September 2007, Liancourt, Oise) was a French sociologist of religions.
He born in a Catholic family from south-western France. In 1970, he was doctor of Letters, then research director of the CNRS. Influenced by the work of Max Weber and Ernst Troeltsch, he was particularly interested in cults, religious conflicts and Christianity (especially Protestantism and its nonconformist sects, Seventh-day Adventism). He was the author of a notable thesis on the Anabaptists and Mennonites. He was also member of the École des hautes études en sciences sociales.
- By Jean Séguy
- Les Sectes protestantes dans la France contemporaine, Paris, Beauchesne, 1956.
- Ernst Troeltsch et sa sociologie du christianisme, Paris, Cercle Ernest Renan, 1961.
- Les Conflits du dialogue, Paris, Le Cerf ed., 1973.
- Les Assemblées anabaptistes-mennonites de France, Paris ; La Haye, Mouton, 1977.
- Christianisme et société. Introduction à la sociologie de Ernst Troeltsch, Paris, Le Cerf ed., 1980.
- Conflit et utopie, ou Réformer l'Église. Parcours wébérien en douze essais, Paris, Le Cerf ed., 1999.