| Upamayo Dam | |
| Coordinates: | -10.9228°N -76.2775°W |
| Country: | Peru |
| Location: | Junín Region, Pasco Region |
| Status: | O |
| Opening: | 1936 |
| Dam Crosses: | Upamayo River |
| Dam Length: | 96m (315feet) |
| Res Capacity Total: | 556000000m2 |
| Location Map: | Peru |
| Dam Height: | 10m (30feet) |
The Upamayo Dam (possibly from Quechua upa calm, silent; mute, mayu river) is a dam at Lake Junin, the largest lake entirely in Peru. It is located on the border of the Junín Region, Junín Province, Ondores District, and the Pasco Region, Pasco Province, Vicco District.
The dam was erected in 1936. It is 10m (30feet) high and 96m (315feet) long. It is operated by Centromín Perú. The reservoir has a capacity of 556000000m2.