| Ardeu | |
| Pushpin Map: | Romania |
| Subdivision Type1: | Country |
| Subdivision Name1: | Romania |
| Subdivision Type2: | Counties |
| Subdivision Name2: | Alba, Hunedoara |
| Subdivision Type3: | Villages |
| Subdivision Name3: | Almașu Mare, Glod, Ardeu |
| Length: | 25km (16miles) |
| Mouth: | Băcâia |
| Mouth Location: | Bozeș |
| Mouth Coordinates: | 45.976°N 23.1714°W |
| Progression: | Băcâia→ Geoagiu→ |
| Basin Size: | 48km2 |
The Ardeu is a right tributary of the river Băcâia in Romania. It flows into the Băcâia in Bozeș. Its length is 25km (16miles) and its basin size is 48km2.