| Afon Fathew | |
| River | |
| Country | Wales |
|---|---|
| Region | Gwynedd |
| Source | |
| - location | Gwynedd |
| Mouth | |
| - location | River Dysynni |
The Afon Fathew (English: River Fathew) is a river in Gwynedd, north-west Wales. The river is downstream from the Dolgoch Falls which is a popular nature site.
The Afon Fathew flows from near Dolgoch and joins the Dysynni to the east of Tywyn near Bryncrug.