| Azul River | |
| Source1 Location: | Rio Grande do Sul state |
| Mouth: | Palomas River |
| Subdivision Type1: | Country |
The Azul River is a river in Rio Grande do Sul in southern Brazil. It is a right tributary of the Palomas River. The name is shared by multiple rivers, including one in Argentina, another that flows through southern Brazil's Paraná state and is a tributary of the Piquiri River. Yet another river by the same name, in western Brazil's Acre state, is a tributary of the Môa River.