| Demini River | |
|---|---|
  | |
| Native name | Rio Demini (Portuguese) |
| Location | |
| Country | Brazil |
| Physical characteristics | |
| Mouth | |
• location | Rio Negro |
• coordinates | 0°46′22″S 62°56′29″W / 0.772800°S 62.941267°W |
| Basin features | |
| River system | Rio Negro |
| Tributaries | |
| • left | Toototobi River |
| • right | Cuieiras River, Araçá River |
Demini River is a river in the Amazon rainforest of the state of Amazonas, Brazil. It is a tributary of the Rio Negro.