| Nereta | |
| Source1 Location: | Sargūni swamp |
| Mouth Coordinates: | 56.1852°N 25.0927°W |
| Subdivision Type1: | Countries |
| Subdivision Type2: | Region |
| Length: | 25km (16miles) |
| Mouth Elevation: | 69.2m (227feet) |
| Basin Size: | 108 km² |
Nereta (Latvian: Neretiņa) is a river of Biržai district municipality, Panevėžys County, northern Lithuania and Southern Latvia. It flows for 25km (16miles). For 18km (11miles), the river forms the border between Latvia and Lithuania. It is a right tributary of the Nemunėlis.[1]