| Căian | |
| Name Other: | Kaján-patak |
| Pushpin Map: | Romania |
| Subdivision Type1: | Country |
| Subdivision Name1: | Romania |
| Subdivision Type2: | Counties |
| Subdivision Name2: | Hunedoara County |
| Subdivision Type3: | Villages |
| Subdivision Name3: | Hărțăgani, Băița, Fizeș, Chișcădaga, Păuliș |
| Length: | 25km (16miles) |
| Mouth: | Mureș |
| Mouth Location: | Bejan |
| Mouth Coordinates: | 45.9275°N 22.8499°W |
| Basin Size: | 170km2 |
| Tributaries Left: | Duba, Stog |
| Tributaries Right: | Răcaș, Ormindea, Peștera, Fornădia |
The Căian (Hungarian: Kaján-patak) is a right tributary of the river Mureș in Romania. It discharges into the Mureș in Bejan. Its length is 25km (16miles) and its basin size is 170km2.