| Turnbull River | |
| Pushpin Map: | New Zealand South Island#New Zealand |
| Pushpin Map Size: | 270px |
| Pushpin Map Caption: | Mouth of the Turnbull River |
| Source1: | Confluence of Cache Stream and Turnback Torrent |
| Source1 Coordinates: | -44.0838°N 169.0054°W |
| Mouth Location: | Tasman Sea |
| Mouth Coordinates: | -43.9042°N 168.9039°W |
| Subdivision Type1: | Country |
| Subdivision Name1: | New Zealand |
| Subdivision Type2: | Region |
| Subdivision Name2: | West Coast |
| Subdivision Type3: | District |
| Subdivision Name3: | Westland |
| Length: | 220NaN0 |
| Progression: | Turnbull River → Tasman Sea |
| Tributaries Left: | Stormy Rivulet, Abandon Brook, Mueller River, Precedent Creek, Question Creek, All-Up Creek, Foregone Creek, Stout Creek |
| Tributaries Right: | Cramp Creek, Shiver Creek, Accident Creek, Io or Ossify Creek, Adieu Creek, Taken -a- Back Creek, Ease Down Creek, Dribble Creek, Gagliardi Creek, Stout Creek, Collyer Creek |
The Turnbull River is a short river on the West Coast of New Zealand's South Island. It flows northwest from the Southern Alps for, entering the Tasman Sea at the northern end of Jackson Bay, south of Haast. The Turnbull shares its mouth with the Okuru River.
The Haast area is not connected to the national electricity grid. New Zealand Energy operates an electricity distribution network supplying the town. Electricity is generated by an 800-kilowatt hydroelectric scheme on the Turnbull River, constructed in 1972. The scheme is backed up by a 375-kilowatt diesel generator.[1] In 2023, the company applied for consent to build a second hydro power station on the Turnbull River.[2]