| Waitewaewae River | |
| Source1 Location: | Tararua Range |
| Mouth Location: | Otaki River |
| Subdivision Type1: | Country |
| Subdivision Name1: | New Zealand |
| Length: | 10abbr=onNaNabbr=on |
The Waitewaewae River is a river of the Wellington Region of New Zealand's North Island. An upper tributary of the Ōtaki River, it flows south through Tararua Forest Park to reach the Ōtaki 20km (10miles) east of Waikanae.