| Official Name: | Sierra Grande |
| Settlement Type: | City and municipality |
| Pushpin Map: | Argentina |
| Pushpin Label Position: | bottom |
| Subdivision Type: | Country |
| Subdivision Name: |  Argentina |
| Subdivision Type2: | Department |
| Subdivision Name2: | San Antonio |
| Established Date: | 19 October 1903 |
| Unit Pref: | Imperial |
| Population As Of: | 2010 census |
| Population Total: | 7,641 |
| Coordinates: | -41.6°N -86°W |
| Blank Name Sec1: | Climate |
| Blank Info Sec1: | Cfc |
Sierra Grande is a city and municipality in the San Antonio Department of Río Negro Province in Argentina. It was founded in 1903, and as of the it counted with a population of 7,641.[1]
The lands where the city now stands was once Tehuelche territory. The first white settlers came from Viedma and Carmen de Patagones; they established a small settlement with the name of Sierra Vieja, later renamed as Colonia Chilavert. On 19 October 1903, the first juez de paz took seat in the settlement, and this is now celebrated as the town's foundational moment. The discovery of iron ore in the region led to the town's growth in the 1940s.[2]