| Jatun Mayu | |
| Name Etymology: | Quechua |
| Subdivision Type1: | Country |
| Subdivision Name1: | Bolivia |
| Subdivision Type3: | Region |
| Subdivision Name3: | Potosí Department |
| Subdivision Type5: | Municipality |
| Subdivision Name5: | Tomás Frías Province |
Jatun Mayu[1] (Quechua hatun, jatun big, great, mayu river,[2] "great river") which upstream is called Tinkipaya is a Bolivian river in the Potosí Department, Tomás Frías Province, Tinkipaya Municipality, Tinkipaya Canton,[3] north of Potosí. It is a left tributary of the upper Pillku Mayu.[4] The confluence is about 10 km south east of Tinkipaya.