Wahianoa River
Native name	Wahianoa (Māori)
Location
Country	New Zealand
Region	Manawatū-Whanganui
District	Ruapehu District
Physical characteristics
Source	Wahianoa Glacier
• location	Mount Ruapehu
• coordinates	39°17′42″S 175°34′34″E / 39.29500°S 175.57611°E / -39.29500; 175.57611
• elevation	2,300 m (7,500 ft)
Mouth	Whangaehu River
• coordinates	39°26′34″S 175°37′35″E / 39.442892°S 175.626397°E / -39.442892; 175.626397
• elevation	740 m (2,430 ft)
Length	21 km (13 mi)
Basin features
Progression	Wahianoa River → Whangaehu River
River system	Whangaehu River

The Wahianoa River is a river of the Manawatū-Whanganui region of New Zealand's North Island. One of the headwaters of the Whangaehu River, it flows southeast from the southern slopes of Mount Ruapehu, gradually veering southwest before meeting the Whangaehu 3 kilometres (2 mi) northwest of Waiouru.^[1]

• List of rivers of New Zealand