| Tancancocha | |
| Map: | Peru |
| Location: | Peru, Ancash Region |
| Elevation M: | 5200 |
| Range: | Andes, Huallanca |
| Coordinates: | -9.9086°N -77.0533°W |
| Map Size: | 200 |
Tancancocha (possibly from Quechua tanka fork, a deep bifurcation, -n a suffix, qucha lake, "lake of the bifurcation") is a mountain in the north of the Huallanca mountain range in the Andes of Peru at a small lake of that name. The mountain reaches an altitude of approximately 5200m (17,100feet). It is located in the Ancash Region, Bolognesi Province, in the districts of Aquia and Huallanca.
The lake named Tancancocha lies in the Huallanca District at, northeast of the peak.