| Jurisdiction: | Diocese |
| Cruz Alta | |
| Latin: | Dioecesis Crucis Altae |
| Rite: | Latin Rite |
| Established: | 15 June 1957 (years ago) |
| Cathedral: | Catedral Divino Espírito Santo |
| Area Km2: | 16,325 |
| Population: | 396,259 |
| Population As Of: | 2004 |
| Catholics: | 317,000 |
| Catholics Percent: | 80.0 |
| Metro Archbishop: | Leomar Antônio Brustolin |
| Bishop: | Nélio Domingos Zortea |
| Map: | File:Diocese de Cruz Alta.svg |
| Website: | www.diocesecruzalta.org.br |
The Roman Catholic Diocese of Cruz Alta (Latin: Dioecesis Crucis Altae) is a diocese located in the city of Cruz Alta in the ecclesiastical province of Santa Maria in Brazil.