| name | image | Average flow (m³/s) | basin (m²) | Height (m) | origin location | mouth location | Length (m) | latitude (°) | longitude (°) | canyon | Map |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Agutsa | Onon River | 120,000 | 49.7867500000 | 111.2052777778 | Map | ||||||
| Baldzha | 8,529,999,872 | Onon River | 211,000 | 49.1106000000 | 111.8889000000 | Map | |||||
| Ilya | 2,960,000,000 | Onon River | 153,000 | 50.7196106000 | 113.0358681000 | Map | |||||
| Aga (river) | 8,000,000,000 | Onon River | 167,000 | 51.0468780000 | 114.4084110000 | Map | |||||
| Borzya (river) | 3 | 7,080,000,000 | Onon River | 304,000 | 50.6302777800 | 115.6619444400 | Map |