| Theravil Aru | |
| Subdivision Type1: | Country |
| Subdivision Name1: | Sri Lanka |
| Subdivision Type2: | Province |
| Subdivision Name2: | Northern Province |
| Subdivision Type3: | Districts |
| Subdivision Name3: | Mullaitivu, Kilinochchi |
| Length: | 23km (14miles) |
| Source1 Location: | Mullaitivu District |
| Mouth: | Chundikkulam Lagoon |
| Basin Size: | 90km2 |
The Theravil Aru (or Toravil Aru) is a river in Northern Province, Sri Lanka. The river rises in central Mullaitivu District, before flowing north through Mullaitivu and Kilinochchi districts. The river empties into Chundikkulam Lagoon.[1]