| Poroporo River | |
| Source1 Location: | Ruatoria Forest |
| Mouth Location: | Waiapu River |
| Subdivision Type1: | Country |
| Subdivision Name1: | New Zealand |
| Length: | 18km (11miles) |
| Source1 Elevation: | 400m (1,300feet) |
| Mouth Elevation: | 0m (00feet) |
The Poroporo River is a river of the Gisborne Region of New Zealand's North Island. It flows east from its sources in the eastern foothills of the Raukumara Range, reaching the Waiapu River close to its mouth, having shared the Waiapu's bed since the town of Tikitiki.