| name | image | Average flow (m³/s) | basin (m²) | Height (m) | origin location | mouth location | Length (m) | latitude (°) | longitude (°) | canyon | Map |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Ox Kill | 42.6586111100 | -74.2180555600 | Map | ||||||||
| Osered | 1 | 2,420,000,000 | 89,000 | 50.4544444400 | 40.0877777800 | Map | |||||
| Oxtongue River | 45.3199869900 | -79.0107536300 | Map | ||||||||
| Ohlsiepen | 501 | ||||||||||
| Obmen | 36,000 | 59.0161111111 | 53.8061111111 | Map |