| Pali Aru | |
| Name Other: | Chamalankulam Aru |
| Subdivision Type1: | Country |
| Subdivision Name1: | Sri Lanka |
| Subdivision Type2: | Province |
| Subdivision Name2: | Northern Province |
| Subdivision Type3: | Districts |
| Subdivision Name3: | Vavuniya, Mullaitivu, Mannar |
| Length: | 50km (30miles) |
| Source1 Location: | Vavuniya District |
| Mouth: | Palk Bay |
| Mouth Location: | Mannar District |
| Basin Size: | 451km2 |
The Pali Aru is a river in Northern Province, Sri Lanka. The river rises in northern Vavuniya District, near Puliyankulam, flowing north/northwest through Vavuniya District, Mullaitivu District and Mannar District. The river empties into Palk Bay. The southern section of the river is sometimes known as the Chamalankulam Aru.[1]