| Official Name: | Challwa Mayu |
| Mapsize: | 250x200px |
| Pushpin Map: | Bolivia |
| Subdivision Type: | Country |
| Subdivision Type1: | Department |
| Subdivision Type2: | Province |
| Subdivision Type3: | Municipality |
| Subdivision Name: | Bolivia |
| Subdivision Name1: | Cochabamba Department |
| Subdivision Name2: | Arani Province |
| Subdivision Name3: | Vacas Municipality |
| Population As Of: | 2001 |
| Population Total: | 770 |
| Timezone: | BOT |
| Utc Offset: | -4 |
| Coordinates: | -17.565°N -65.595°W |
| Elevation M: | 3474 |
Challwa Mayu [1] (Quechua challwa fish, mayu river,[2] "fish river", hispaniciced spelling Challhua Mayu) is a Bolivian village in the south-east of the Cochabamba Department located in the Arani Province, Vacas Municipality, north-west of Vacas. At the time of census 2001 it had 770 inhabitants.[3]
The Ismael Montes Teacher Training College is situated in Challwa Mayu.[4]