| Kodalikkallu Aru | |
| Subdivision Type1: | Country |
| Subdivision Name1: | Sri Lanka |
| Subdivision Type2: | Province |
| Subdivision Name2: | Northern Province |
| Subdivision Type3: | District |
| Subdivision Name3: | Mullaitivu District |
| Length: | 19km (12miles) |
| Source1 Location: | Mullaitivu District |
| Mouth: | Nanthi Lagoon |
| Basin Size: | 74km2 |
The Kodalikkallu Aru is a small river in Northern Province, Sri Lanka. The river rises in south-east Mullaitivu District, and flows in north/north-east through Mullaitivu district. The river empties into Nanthi Kadal lagoon.[1]