| Little Wanganui River | |
| Pushpin Map: | New Zealand#New Zealand South Island |
| Pushpin Map Size: | 270px |
| Pushpin Map Caption: | Mouth of the Little Wanganui River |
| Source1: | Saddle Lakes |
| Source1 Coordinates: | -41.3911°N 172.2906°W |
| Mouth Location: | Karamea Bight |
| Mouth Coordinates: | -41.391°N 172.0573°W |
| Subdivision Type1: | Country |
| Subdivision Name1: | New Zealand |
| Length: | 21km (13miles) |
| Progression: | Little Wanganui River → Karamea Bight → Tasman Sea |
| Tributaries Left: | Kiwi Creek, Piano Creek, Copper Creek, Specimen Creek, Blacktopp Creek, Hodge Creek, Captain Creek, Blue Duck Creek, Tidal Creek, O'Connor Creek, Glasseye Creek |
| Tributaries Right: | Winter Creek, Tangent Creek, McHarrie Creek, Smith Creek, Drain Creek, Lawrence Creek, Pigeon Creek, Limestone Creek, Slaty Creek, |
| Bridges: | Little Whanganui Bridge |
The Little Wanganui River is a river of the West Coast Region of New Zealand's South Island. It flows generally west from the slopes of Mount Allen, reaching the Karamea Bight close to the small settlement of Little Wanganui. It is home to a large number of trout.[1]