| Akkarayan Aru | |
| Pushpin Map: | Sri Lanka |
| Pushpin Map Caption: | Location of mouth |
| Subdivision Type1: | Country |
| Subdivision Name1: | Sri Lanka |
| Subdivision Type2: | Province |
| Subdivision Name2: | Northern Province |
| Subdivision Type3: | Districts |
| Subdivision Name3: | Mullaitivu, Kilinochchi |
| Length: | 25km (16miles) |
| Source1 Location: | Mullaitivu District |
| Mouth: | Jaffna Lagoon |
| Basin Size: | 192km2 |
The Akkarayan Aru is a river in Northern Province, Sri Lanka. The river rises in north-west Mullaitivu District. It flows north through Mullaitivu and Kilinochchi districts before emptying into Jaffna Lagoon.[1]