| Rosario de la Frontera | |
| Native Name Lang: | es |
| Settlement Type: | City |
| Pushpin Map: | Argentina |
| Pushpin Map Caption: | Location of Rosario de la Frontera in Argentina |
| Coordinates: | -25.8°N -122°W |
| Subdivision Type: | Country |
| Subdivision Name: |  Argentina |
| Subdivision Type1: | Province |
| Subdivision Type2: | Department |
| Subdivision Name2: | Rosario de la Frontera |
| Unit Pref: | Metric |
| Area Total Km2: | 5402 |
| Elevation M: | 770 |
| Population Total: | 26,174 |
| Population As Of: | 2010 census |
| Population Density Km2: | auto |
| Timezone1: | ART |
| Utc Offset1: | -3 |
| Postal Code Type: | CPA base |
| Postal Code: | A4190 |
| Area Code Type: | Dialing code |
| Area Code: | +54 3876 |
| Blank Name: | Climate |
| Blank Info: | BSh |
Rosario de la Frontera is a city in the center-south of the province of Salta, Argentina. It has 26,174 inhabitants as per the, and is the head town of the Rosario de la Frontera Department. It is located on National Route 9, by the Horcones River.
Rosario de la Frontera has a dry-winter humid subtropical climate (Köppen Cwa), characterised by very warm and uncomfortably humid summers alongside pleasant to warm, dry winters with cold mornings and occasional frosts.