| Junín | |
| Native Name Lang: | es |
| Settlement Type: | Department |
| Mapsize: | frameless |
| Seat: | Santa Rosa del Conlara |
| Population: | 20,271 |
| Coordinates: | -32.3333°N -77°W |
| Subdivision Type: | Country |
| Subdivision Name: |  Argentina |
| Subdivision Type1: | Province |
| Area Total Km2: | 2,476 |
| Area Footnotes: | [1] |
Junín is a Department of San Luis Province, Argentina.
With an area of 2476sqkm it borders to the west with the Department of Ayacucho, to the south with San Martín and Chacabuco, to the north with the provinces of Córdoba.