The Diocese of Achonry is a Roman Catholic diocese located in the west of Ireland. It covers parts of counties Sligo and Leitrim, and its seat is in the town of Ballaghaderreen. The diocese was established in the 12th century and is part of the Province of Tuam. The diocese is known for its rich history and cultural heritage, including several historic churches and religious sites. It serves a diverse community and is involved in various pastoral and educational activities, aiming to promote the teachings of the Catholic Church in the region.