| Janq'u Willk'i | |
| Elevation M: | 4900 |
| Location: | Bolivia, Oruro Department |
| Range: | Andes |
| Map: | Bolivia |
| Label Position: | right |
| Map Size: | 200 |
| Coordinates: | -18.1394°N -68.3961°W |
Janq'u Willk'i (Aymara jach'a big, qullu mountain, "big mountain", also spelled Jankho Willkhi) is a mountain in the Andes of Bolivia which reaches a height of approximately 4900m (16,100feet). It is located in the Oruro Department, Sajama Province, Turco Municipality. Janq'u Willk'i lies southwest of Ch'iyar Jaqhi.