| Lefini River | |
| Subdivision Type1: | Country |
| Subdivision Name1: | Republic of the Congo |
| Mouth: | Congo River |
| Mouth Coordinates: | -2.9381°N 16.1336°W |
Lefini River (Swahili: Mto Lefini) is a river of the Republic of Congo and a tributary of the Congo River. Henry Morton Stanley reached the confluence on 9 March 1877.[1]