The Diocese of Elphin is a Roman Catholic diocese located in the northwest of Ireland. It covers parts of counties Roscommon, Sligo, and Leitrim, with its cathedral situated in the town of Elphin. The diocese is part of the ecclesiastical province of Tuam and serves a diverse community of Catholics. Established in the 12th century, the diocese has a rich history and has undergone various changes over the centuries. It is responsible for the spiritual and administrative needs of its parishes, providing support to local clergy and engaging in community outreach programs.