Marie Breen Smyth (born 26 January 1953) is an author, teacher and researcher from Northern Ireland.
She has published on topics such as the Northern Ireland conflict, particularly the human impact, trauma, victim politics, children and armed conflict, research ethics and methods, religion and conflict, and issues to do with political violence in Southern Africa, Israel/Palestine and Northern Ireland.
She was previously known as Marie Smyth but adopted the surname of her husband, Alan Johnston Breen, after his death on 7 July 2005.