| Cucuiș | |
| Pushpin Map: | Romania |
| Subdivision Type1: | Country |
| Subdivision Name1: | Romania |
| Subdivision Type2: | Counties |
| Subdivision Name2: | Hunedoara County |
| Subdivision Type3: | Villages |
| Subdivision Name3: | Cucuiș, Căstău |
| Length: | 13km (08miles) |
| Mouth: | Sibișel |
| Mouth Location: | Căstău |
| Mouth Coordinates: | 45.8241°N 23.208°W |
| Progression: | Sibișel→ |
| Basin Size: | 28km2 |
The Cucuiș is a right tributary of the river Sibișel in Romania. It flows into the Sibișel near Căstău.[1] Its length is 13km (08miles) and its basin size is 28km2.