| Waiwhakaiho River | |
| Pushpin Map: | New Zealand#New Zealand North Island |
| Pushpin Map Size: | 270px |
| Pushpin Map Caption: | Mouth of the Waiwhakaiho River |
| Source1 Location: | Mount Taranaki |
| Source1 Coordinates: | -39.2881°N 174.0707°W |
| Source1 Elevation: | 2000m (7,000feet) |
| Mouth Location: | North Taranaki Bight |
| Mouth Elevation: | 0m (00feet) |
| Mouth Coordinates: | -39.0371°N 174.1073°W |
| Subdivision Type1: | Country |
| Subdivision Name1: | New Zealand |
| Length: | 30km (20miles) |
| Basin Size: | 136km2 |
| Progression: | Waiwhakaiho River → North Taranaki Bight → Tasman Sea |
| Tributaries Left: | Kokowai Stream, Karaka Tonga Stream, Kai Auahi Stream, Mangamahoe Stream, Mangorei Stream |
| Tributaries Right: | Ram Stream, Camp Stream, Araheke Stream, Mangaone Stream |
| Bridges: | Te Rewa Rewa Bridge |
The Waiwhakaiho River is a river of the Taranaki Region of New Zealand's North Island. One of many rivers and streams radiating from the slopes of Taranaki/Mount Egmont, it flows initially northeast before veering northwest to reach the Tasman Sea close to the New Plymouth suburb of Fitzroy. Near the sea, it is crossed by the coastal walkway, connecting New Plymouth with Bell Block via the Te Rewa Rewa Bridge.[1]
The river is also bridged by SH3 and the Marton–New Plymouth railway line.