| Little Slate River | |
|---|---|
 Route of the Little Slate River | |
  Mouth of the Little Slate River  Little Slate River (South Island) | |
| Location | |
| Country | New Zealand |
| Physical characteristics | |
| Source | |
| • location | Mount Treblow |
| • coordinates | 40°48′18″S172°35′48″E / 40.805°S 172.5966°E |
| • elevation | 468 metres (1,535 ft) |
| Mouth | |
• location | Aorere River |
• coordinates | 40°46′00″S172°35′50″E / 40.7666°S 172.5971°E |
| Basin features | |
| Progression | Little Slate River → Aorere River → Ruataniwha Inlet → Golden Bay / Mohua → Tasman Sea |
The Little Slate River is a river of New Zealand's Tasman Region. As with its neighbour, the Slate River, it is a tributary of the Aorere River. The Little Slate meets the Aorere 15 kilometres southwest of Collingwood.