| Reiu | |
| Subdivision Type1: | Countries |
| Length: | 73km (45miles) |
| Source1 Elevation: | 50m (160feet) |
| Discharge1 Avg: | 17.3m3/s |
| Basin Size: | 917km2 |
The Reiu is a 73km (45miles) long river in southwest Estonia. Its source is Lake Soka in Latvia. It flows generally north. It is a left tributary of the Pärnu River, which it flows into near the city of Pärnu. The basin area of the Reiu is 917 km2, and its average discharge 17.3 m³/s.[1]