| Mortăuța | |
| Pushpin Map: | Romania |
| Subdivision Type1: | Country |
| Subdivision Name1: | Romania |
| Subdivision Type2: | Counties |
| Subdivision Name2: | Sălaj County |
| Subdivision Type3: | Villages |
| Subdivision Name3: | Huseni, Ratin |
| Length: | 12km (07miles) |
| Mouth: | Crasna |
| Mouth Location: | Crasna |
| Mouth Coordinates: | 47.1804°N 22.8876°W |
| Basin Size: | 48km2 |
| Tributaries Right: | Carhani, Ratova |
The Mortăuța is a left tributary of the river Crasna in Romania. It discharges into the Crasna near the town Crasna. Its length is 12km (07miles) and its basin size is 48km2.