| K'usill Willk'i | |
| Elevation M: | 4200 |
| Location: | Bolivia La Paz Department |
| Range: | Andes |
| Map: | Bolivia |
| Label Position: | right |
| Map Size: | 200 |
| Coordinates: | -16.7033°N -67.6475°W |
K'usill Willk'i (Aymara k'usillu monkey, willk'i gap, "monkey gap", also spelled Khusill Willkhi, Khuzill Willkhi) is a mountain in the Bolivian Andes which reaches a height of approximately 4200m (13,800feet). It is located in the La Paz Department, Sud Yungas Province, Irupana Municipality. K'usill Willk'i lies northeast of Jukumarini.