| Luncavița | |
| Name Other: | Cetățuia |
| Pushpin Map: | Romania |
| Subdivision Type1: | Country |
| Subdivision Name1: | Romania |
| Subdivision Type2: | Counties |
| Subdivision Name2: | Tulcea County |
| Subdivision Type3: | Villages |
| Subdivision Name3: | Luncavița |
| Length: | 10km (10miles) |
| Source1: | Măcin Mountains |
| Mouth: | Gârla Ciulineț |
| Mouth Location: | Luncavița |
| Mouth Coordinates: | 45.2946°N 28.2888°W |
| Progression: | Gârla Ciulineț→ |
| Basin Size: | 58km2 |
| Tributaries Left: | Valea Fagilor |
| Tributaries Right: | Valea Glonțului |
The Luncavița (also known as Cetățuia in its upper course) is a river in Romania, tributary of the Gârla Ciulineț, which flows into the Danube.[1] Its source is in the Măcin Mountains. It flows into the Gârla Ciulineț near the village Luncavița.[2] Its length is 10km (10miles) and its basin size is 58km2.