| Dillon River | |
| Mouth Location: | Confluence with Waiau Toa / Clarence River |
| Subdivision Type1: | Country |
| Subdivision Name1: | New Zealand |
| Subdivision Type2: | Location |
| Subdivision Name2: | Marlborough Region, South Island |
| Length Km: | 28 |
| Mouth Elevation: | 670m (2,200feet) |
| River System: | Waiau Toa / Clarence River system |
The Dillon River of the Marlborough Region of New Zealand rises in the Inland Kaikōura Range near Carters Saddle. From its source, it flows south-west for 28km (17miles) to join with the upper Waiau Toa / Clarence River 20km (10miles) northeast of Hanmer Springs. The river's course lies largely parallel with that of the Acheron River, which flows 8km (05miles) to the west.[1] The river was named after the 19th-century settler Constantine Dillon, who owned a sheep run near the Omaka River.[2]