| Arapaoa River | |
|---|---|
 | |
| Location | |
| Country | New Zealand |
| Physical characteristics | |
| Mouth | |
• location | Kaipara Harbour |
| Length | 17 km (11 mi) |
The Arapaoa River is a northeastern arm of the Kaipara Harbour in Northland, New Zealand. Officially designated as a river, it is some 17 kilometres (11 mi) long and an average of 3 kilometres (2 mi) wide.