| Jurisdiction: | Diocese |
| Río Gallegos | |
| Latin: | Dioecesis Rivogallaecensis |
| Country: | Argentina |
| Metropolitan: | Bahía Blanca |
| Province: | Bahía Blanca |
| Coordinates: | -51.6228°N -69.217°W |
| Area Km2: | 265,614 |
| Population: | 303,000 |
| Population As Of: | 2010 |
| Catholics: | 212,000 |
| Catholics Percent: | 70 |
| Parishes: | 30 |
| Denomination: | Catholic |
| Sui Iuris Church: | Latin Church |
| Rite: | Roman Rite |
| Established: | 10 April 1961 (years ago) |
| Cathedral: | Cathedral of Our Lady of Lujan in Río Gallegos, Santa Cruz |
| Bishop: | Ignacio Damián Medina |
| Metro Archbishop: | Carlos Alfonso Azpiroz Costa |
| Emeritus Bishops: | Juan Carlos Romanin, SDB |
The Roman Catholic Diocese of Río Gallegos is located in the city of Río Gallegos, which is the capital of the Patagonia region of Santa Cruz, Argentina.
The Diocese, according to the Vatican Information Service (VIS), has an area of 265,614 square miles, a total population of 300,000, a Catholic population of 210,000, 55 priests, 9 permanent deacons, and 94 religious.
It was erected in 1961, and was formed from the Diocese of Comodoro Rivadavia, Argentina. It is a suffragan see of the Archdiocese of Bahia Blanca, Argentina.