| Arigiin River | |
| Subdivision Type1: | Country |
| Subdivision Name1: | Mongolia |
| Subdivision Type2: | Aimags |
| Subdivision Name2: | Khövsgöl aimag |
| Source1: | Döm Mountain |
| Source1 Location: | Chandmani-Öndör sum |
| Source1 Coordinates: | 50.2222°N 100.6208°W |
| Mouth: | Üür River |
| Mouth Location: | Tsagaan-Üür sum |
| Mouth Coordinates: | 50.5139°N 101.5806°W |
| Progression: | Üür River→ |
Arigiin River (mn|Аригийн гол) is a river in the Khövsgöl aimag of Mongolia.It starts next to Döm Mountain in the confluence of two smaller rivers at the border between Alag-Erdene and Chandmani-Öndör sums, continuing through the latter.[1] It discharges into the Üür River next to the Tsagaan-Üür sum center.[2]