| Cerro de Oro | |
| Native Name Lang: | es |
| Settlement Type: | Municipality |
| Pushpin Map: | Argentina |
| Pushpin Map Caption: | Location of Cerro de Oro in Argentina |
| Coordinates: | -32.3831°N -65°W |
| Subdivision Type: | Country |
| Subdivision Name: | Argentina |
| Subdivision Type1: | Province |
| Subdivision Name1: | San Luis |
| Subdivision Type2: | Department |
| Leader Title: | Mayor |
| Unit Pref: | Metric |
| Elevation M: | 870 |
| Population Total: | 314 (INDEC, 2001) |
| Population Density Km2: | auto |
| Timezone1: | ART |
| Utc Offset1: | -3 |
| Postal Code Type: | CPA base |
| Postal Code: | D5881 |
| Area Code Type: | Dialing code |
| Area Code: | +54 02656 |
Cerro de Oro is a small town and municipality in Junin Department in Argentina.[1] It is located in the northeast corner of San Luis Province, east of the city of Santa Rosa de Conlara, near the border with Córdoba Province.
It had 314 inhabitants in 2001 (INDEC, 2001), representing an increase of 68% compared to the 187 inhabitants (INDEC, 1991) the previous census.