Waiau (disambiguation)

Waiau could refer to several places in New Zealand:
* Waiau, Canterbury
* Waiau, Taranaki
* Waiau, Coromandel, on the Coromandel Peninsula
* Waiau, Auckland, south of Auckland
* Waiau Bay
* Waiau Branch, a Canterbury branch line railway in service from 1882 to 1978: see also Weka Pass Railway
* Waiau River, Hawke's Bay
* Waiau River, Canterbury
* Waiau River, Southland

It can also refer to Lake Waiau, on Mauna Kea in Hawaiokinai.