| Unini River | |
|---|---|
  | |
| Native name | Rio Unini (Portuguese) |
| Location | |
| Country | Brazil |
| Physical characteristics | |
| Source | |
| • location | Amazonas |
| • coordinates | 1°41′15″S 63°48′38″W / 1.687561°S 63.810452°W |
| Mouth | |
• location | Rio Negro, Amazonas |
• coordinates | 1°40′25″S 61°30′22″W / 1.6736°S 61.5061°W |
| Length | 400 km (250 mi) |
| Basin size | 27,000 km2 (10,000 sq mi) |
| Discharge | |
| • location | Confluence of Rio Negro, Amazonas State |
| • average | 1,050 m3/s (37,000 cu ft/s) |
| Basin features | |
| River system | Rio Negro |
The Unini River (Portuguese: Rio Unini) is a river located in the Amazonas state in north-western Brazil. It serves as a right tributary of the Rio Negro.