| name | image | Average flow (m³/s) | basin (m²) | Height (m) | origin location | mouth location | Length (m) | latitude (°) | longitude (°) | canyon | Map |
|---|---|---|---|---|---|---|---|---|---|---|---|
| River Boyne |  | 2,695,000,064 | 89 | Irish sea | 112,000 | 53.7166666667 | -6.2500000000 | Map | |||
| River Clwyd |  | 900,000,000 | Irish sea | 55,000 | 53.0701700000 | -3.4267900000 | Map | ||||
| River Cocker, Lancashire |  | Irish sea | 53.9664000000 | -2.8569400000 | Map | ||||||
| River Conwy |  | 590,000,000 | 454 | Irish sea | 43,000 | 53.3000000000 | -3.8333333333 | Map | |||
| River Dargle |  | Irish sea | 20,000 | 53.2087000000 | -6.1025000000 | Map |