| Jach'a Wayllani | |
| Elevation M: | 4140 |
| Location: | Bolivia La Paz Department |
| Range: | Andes |
| Map: | Bolivia |
| Label Position: | right |
| Map Size: | 200 |
| Coordinates: | -17.0983°N -67.5211°W |
Jach'a Wayllani (Aymara jach'a big, waylla Stipa obtusa, a kind of feather grass, -ni a suffix, "the big one with Stipa obtusa", also spelled Jachcha Huayllani) is a mountain in the Bolivian Andes which reaches a height of approximately 4140m (13,580feet). It is located in the La Paz Department, Loayza Province, Luribay Municipality. Jach'a Wayllani lies southeast of Jach'a Walluni and Tani Tani.