| Fonău | |
| Pushpin Map: | Romania |
| Subdivision Type1: | Country |
| Subdivision Name1: | Romania |
| Subdivision Type2: | Counties |
| Subdivision Name2: | Bihor County |
| Subdivision Type3: | Villages |
| Subdivision Name3: | Cărăndeni, Cărănzel, Fonău |
| Source1: | Cărăndeni |
| Source1 Coordinates: | 46.8714°N 22.0656°W |
| Source1 Elevation: | 285m (935feet) |
| Mouth: | Valea Nouă |
| Mouth Location: | Husasău de Tinca |
| Mouth Coordinates: | 46.8197°N 21.9283°W |
| Mouth Elevation: | 137m (449feet) |
| Progression: | Valea Nouă→ |
The Fonău is a left tributary of the Valea Nouă in Romania. It flows into the Valea Nouă in Husasău de Tinca. Its length is 18km (11miles) and its basin size is 30km2.