| Jurisdiction: | Diocese |
| Santa Rosa in Argentina | |
| Latin: | Dioecesis Sanctae Rosae in Argentina |
| Local: | Diócesis de Santa Rosa |
| Country: | Argentina |
| Metropolitan: | Bahía Blanca |
| Province: | Bahía Blanca |
| Area Km2: | 143,440 |
| Population: | 341,456 |
| Population As Of: | 2010 |
| Catholics: | 169,000 |
| Catholics Percent: | 49.5 |
| Parishes: | 26 |
| Denomination: | Roman Catholic |
| Rite: | Roman Rite |
| Established: | 11 February 1957 (years ago) |
| Cathedral: | Cathedral of St Rose of Lima in Santa Rosa, La Pampa |
| Patron: | St Rose of Lima |
| Bishop: | Raúl Martín |
| Metro Archbishop: | Carlos Alfonso Azpiroz Costa |
| Emeritus Bishops: | Rinaldo Fidel Brédice |
| Website: | Website of the Diocese |
The Roman Catholic Diocese of Santa Rosa in Argentina is located in the city of Santa Rosa, La Pampa, Argentina. It was established by Pope Pius XII on 11 February 1957, and is a suffragan diocese in the province of Bahía Blanca.