| Kaikou River | |
| Mouth Location: | Hikurangi River |
| Subdivision Type1: | Country |
| Subdivision Name1: | New Zealand |
| Length: | 25km (16miles) |
The Kaikou River is a river of the Northland Region of New Zealand's North Island. It flows initially north, then east, and finally south, from its source approximately halfway between Dargaville and Kaikohe, before joining with the Moengawahine Stream to become the Hikurangi River.