| SAN MARTIN | |
| Native Name: | Departamento San Martín |
| Settlement Type: | Department |
| Coordinates: | -31.5°N -85°W |
| Subdivision Type: | Country |
| Subdivision Name: | Argentina |
| Established Title: | Established |
| Established Date: | 19 September 1942 |
| Seat Type: | Seat |
| Seat: | San Martín |
| Leader Title: | Mayor |
| Unit Pref: | Metric |
| Area Total Km2: | 435 |
| Population Total: | 10140 |
| Population Density Km2: | auto |
| Postal Code Type: | Postal Code |
| Postal Code: | 5400 |
| Postal2 Code Type: | IFAM |
| Postal2 Code: | SJU013 |
| Area Code Type: | Area Code |
| Area Code: | 0264 |
| Blank Name Sec1: | Patron saint |
| Blank Info Sec1: | San Juan Bosco |
San Martín is a department in the east of San Juan province (Argentina). It is predominantly a landscape of mountains in the east and significant production wine, with the installation of prestigious wineries with a remarkable track record in the province known nationally by the development of wine table and fine wine.
The department was created on 19 September 1942 from a division of other lands, taking its name from José de San Martín.[1] In 1996, it became the second controlled appellation established in Mendoza alongside the renowned Luján de Cuyo.