| Kō'ula River | |
| Pushpin Map: | United States Kauai#Hawaii |
| Subdivision Type1: | Country |
| Subdivision Name1: | United States |
| Subdivision Type2: | State |
| Subdivision Name2: | Hawaii |
| Discharge1 Location: | mouth |
| Source1: | Mt. Waialeale |
| Mouth: | Hanapēpē River |
| Mouth Coordinates: | 21.9551°N -159.5505°W |
| Mouth Elevation: | 0m (00feet) |
The Kō'ula River or Koula is the largest tributary of the Hanapēpē River on the Hawaiian island of Kauai. It rises at 4,642 ft (1415 meters) on the slopes of Mt. Waialeale and flows generally south for 9.2 miles to its confluence with the Manuahi Stream.[1] Beyond this point it is known as the Hanapēpē River.[2] The river has a long-term mean discharge of 85.2 cubic feet (0.99 cubic meters) per second.[3]