| Tenaru | |
| Subdivision Type1: | Country |
| Subdivision Name1: | Solomon Islands |
| Discharge1 Location: | mouth |
| Source1 Location: | Guadalcanal |
| Mouth Location: | Savo Sound |
The Tenaru is the name of a river on the northern coast of Guadalcanal with a tributary at Ironbottom Sound (called Savo Sound prior to World War II). During World War II, it was the site for the Battle of the Tenaru River.