| Jurisdiction: | Diocese |
| Mao-Monte Cristi | |
| Latin: | Dioecesis Maoënsis–Montis Christi |
| Country: | Dominican Republic |
| Metropolitan: | Mao |
| Province: | Province of Santiago de los Caballeros |
| Area Km2: | 4,841 |
| Population: | 400,000 |
| Population As Of: | 2004 |
| Catholics: | 380,000 |
| Catholics Percent: | 95 |
| Parishes: | 22 |
| Denomination: | Roman Catholic |
| Rite: | Latin Rite |
| Established: | 16 January 1978 (years ago) |
| Cathedral: | Cathedral of the Holy Cross |
| Bishop Title: | Bishop |
| Map: | Diócesis_de_Mao-Monte_Cristi.svg |
The Roman Catholic Diocese of Mao–Monte Cristi (Latin: Dioecesis Maoënsis–Montis Christi) (erected 16 January 1978) is a suffragan diocese of the Archdiocese of Santiago de los Caballeros.