The Breifne Historical Society (Cumann Seanchais Bhreifne) is a non-political and non-sectarian organization dedicated to the preservation, research, and promotion of the history and heritage of the Breifne region, covering Cavan, Leitrim, and Fermanagh. The society fosters community engagement through an annual lecture series, historical tours, and the publication of its reputable annual journal, 'Breifne', which documents historical research and articles.