| Jurisdiction: | Diocese |
| Criciúma | |
| Latin: | Dioecesis Criciumensis |
| Local: | Criciúma |
| Country: |  Brazil |
| Rite: | Latin Rite |
| Established: | 27 May 1998 (years ago) |
| Cathedral: | Cathedral of St Joseph in Criciúma |
| Area Km2: | 5,093 |
| Population: | 525,000 |
| Population As Of: | 2006 |
| Catholics: | 435,000 |
| Catholics Percent: | 82.9 |
| Metro Archbishop: | Wilson Tadeu Jönck, SCI |
| Map: | File:Diocese de Criciúma.svg |
| Website: | www.diocesecriciuma.com.br |
The Roman Catholic Diocese of Criciúma (Latin: Dioecesis Criciumensis) is a diocese located in the city of Criciúma in the ecclesiastical province of Florianópolis in Brazil.