| Desaguadero | |
| Map: | Mapa cuencas endorréicas meseta del collao.jpg |
| Subdivision Type1: | Country |
| Subdivision Name1: | Peru, Bolivia |
| Subdivision Type3: | Region |
| Subdivision Name3: | Altiplano |
| Subdivision Type5: | Cities |
| Subdivision Name5: | Desaguadero, San Andrés, Oruro |
| Length: | 320km (200miles) |
| Discharge1 Location: | Ulloma |
| Discharge1 Min: | 28m3/s |
| Discharge1 Avg: | 78m3/s |
| Discharge1 Max: | 282m3/s |
| Source1: | Lake Titicaca |
| Source1 Location: | Desaguadero, Peru |
| Source1 Coordinates: | -16.5636°N -69.0364°W |
| Source1 Elevation: | 3811m (12,503feet) |
| Mouth: | Poopó Lake |
| Mouth Location: | 50km (30miles) S of Oruro, Bolivia |
| Mouth Coordinates: | -18.4419°N -67.0728°W |
| Mouth Elevation: | 3686m (12,093feet) |
| Basin Size: | 90000km2approx. |
| Tributaries Left: | Ch'alla Jawira, Llallawa Jawira, Jach'a Jawira (Caquiaviri), Thujsa Jawira, Qala Jawira, Jach'a Jawira (Ingavi) |
| Tributaries Right: | Qullpa Jawira |
The Desaguadero River, also known as Risawariru or Uchusumain, is a river shared between Bolivia and Peru. It drains Lake Titicaca from the southern part of the river basin, flowing south and draining approximately five percent of the lake's flood waters into Lake Uru Uru and Lake Poopó.[1] Its source in the north is very near the Peruvian border.
It is navigable only by small craft and supports indigenous communities such as the Uru Muratu community.