Grantham River

Grantham River
Location of the mouth within New Zealand
Location
CountryNew Zealand
Physical characteristics
Source 
  locationHanmer Range
Mouth 
  location
Waiau Uwha River

The Grantham River is a river in the Canterbury region of New Zealand. It arises in the Hanmer Range near Mount Miromiro, in the Hanmer Forest Park, and flows south-east into the Waiau Uwha River, which has its mouth on the Pacific Ocean.

A thermal spring on the river is undeveloped.