The Diocese of Montepeloso (also Diocese of Irsina) (Latin: Dioecesis Montis Pelusii) was a Roman Catholic diocese located in the town of Montepeloso in the province of Matera in the Southern Italian region of Basilicata. It was united with the Diocese of Gravina (di Puglia) to form the Diocese of Gravina e Irsina (Montepeloso) in 1818.
Latin Name: Montis Pelusii
Metropolitan: Archdiocese of Trani
27 June 1818: United with the Diocese of Gravina (di Puglia) to form the Diocese of Gravina e Irsina (Montepeloso)