| Isku | |
| Elevation M: | 5000 |
| Elevation Ref: | [1] |
| Range: | Andes |
| Location: | Peru, Lima Region, Oyón Province |
| Map: | Peru |
| Map Size: | 200 |
| Coordinates: | -10.6144°N -76.7072°W |
Isku (Quechua for lime, hispanicized spelling Iscu) is a mountain in the Andes of Peru, about 5000m (16,000feet) high. It is located in the Lima Region, Oyón Province, Oyón District. Isku lies southeast of Yana Uqhu.[1]