| Chiñi Mayu | |
| Name Etymology: | Quechua |
| Subdivision Type1: | Country |
| Subdivision Name1: | Bolivia |
| Subdivision Type3: | Region |
| Subdivision Name3: | Chuquisaca Department |
| Subdivision Type5: | Municipality |
| Subdivision Name5: | Nor Cinti Province |
| Mouth: | Tumusla River |
| Tributaries Left: | Parintaca, Nasa Q'ara, Ch'uru, San Pedro |
Chiñi Mayu (Quechua chiñi bat, mayu river,[1] "bat river", hispanicized spellings Chiñimayu, Chini Mayu) is a Bolivian river in the Chuquisaca Department, Nor Cinti Province, San Lucas Municipality and Camargo Municipality.[2] It belongs to the Pillku Mayu river basin.[3]
Upstream in the Ocuri Canton, the river is called Churki. Its direction is mainly south west. Chiñi Mayu flows along the village of the same name. After having passed the town Camargo, it receives the name Camargo[4] before joining Tumusla River as a left tributary.