| Rotunda | |
| Pushpin Map: | Romania |
| Subdivision Type1: | Country |
| Subdivision Name1: | Romania |
| Subdivision Type2: | Counties |
| Subdivision Name2: | Maramureș County |
| Subdivision Type3: | Villages |
| Subdivision Name3: | Ungureni, Libotin, Rogoz |
| Length: | 21km (13miles) |
| Mouth: | Lăpuș |
| Mouth Location: | Rogoz |
| Mouth Coordinates: | 47.4719°N 23.9244°W |
| Mouth Elevation: | 345m (1,132feet) |
| Basin Size: | 72km2 |
| Tributaries Right: | Șatra |
The Rotunda (in its upper course also: Ungureni) is a right tributary of the river Lăpuș in Romania. It flows into the Lăpuș in Rogoz. Its length is 21km (13miles) and its basin size is 72km2.