| Jurisdiction: | Diocese |
| Matanzas | |
| Latin: | Dioecesis Matansansis |
| Country: | Cuba |
| Metropolitan: | Matanzas |
| Province: | Province of San Cristóbal de la Habana |
| Area Km2: | 8,444 |
| Population: | 690,400 |
| Population As Of: | 2004 |
| Catholics: | 478,000 |
| Catholics Percent: | 69.2 |
| Parishes: | 37 |
| Denomination: | Catholic Church |
| Sui Iuris Church: | Latin Church |
| Rite: | Roman Rite |
| Established: | 10 December 1912 (years ago) |
| Cathedral: | Cathedral of St. Charles Borromeo |
| Bishop Title: | Bishop |
| Emeritus Bishops: | Manuel Hilario de Céspedes y García Menocal |
| Map: | Diócesis de Matanzas.svg |
The Diocese of Matanzas is a Latin Church ecclesiastic territory or diocese of the Catholic Church in Cuba. It is a suffragan diocese in the ecclesiastical province of the metropolitan Archdiocese of San Cristobal de la Habana. The diocese was erected 10 December 1912.