Waikōau River

Waikōau River
Swing bridge over Waikōau River, Tuatapere Hump Ridge Track
Route of Waikōau River
Mouth of Waikōau River
Waikōau River (South Island)
Waikōau River (New Zealand)
Location
CountryNew Zealand
RegionSouthland
DistrictSouthland
Physical characteristics
Source 
  coordinates46°05′08″S 167°19′04″E / 46.0856°S 167.3178°E / -46.0856; 167.3178
Mouth 
  location
Te Waewae Bay
  coordinates
46°08′59″S 167°26′42″E / 46.1496°S 167.445°E / -46.1496; 167.445
  elevation
0 metres (0 ft)
Basin features
ProgressionWaikōau RiverTe Waewae BayFoveaux Strait

The Waikōau River is a river in southern Fiordland, New Zealand. Since 21 June 2019 the official name has been Waikōau River. Waikōau River North Branch has been the official name of a tributary, which joins the river about a kilometre from the sea, since 19 December 2019. Rising north of the Hump Ridge, it flows south-eastward into Te Waewae Bay.

The New Zealand Ministry for Culture and Heritage gives a translation of "waters of the shag" for Waikōau.

There is also a Waikoau River in Hawke's Bay, which flows into the Aropaoanui River.