| name | image | Average flow (m³/s) | basin (m²) | Height (m) | origin location | mouth location | Length (m) | latitude (°) | longitude (°) | canyon | Map |
|---|---|---|---|---|---|---|---|---|---|---|---|
| River Mourne |  | River Derg | River Foyle | 13,000 | 54.8216611111 | -7.4581694444 | Map | ||||
| Camowen River |  | River Foyle | 45,000 | 54.5634760000 | -6.9601560000 | Map | |||||
| River Finn (Foyle tributary) |  | 500,000,000 | Lough finn | River Foyle | 63,170 | 54.8275000000 | -7.4847222222 | Map |