Ohau or Ōhau may refer to the following in New Zealand:
In the Manawatū-Whanganui Region Ōhau, semi-rural community in the Manawatū-Whanganui region Ohau railway station (former) in the settlement of Ōhau Ōhau River (Manawatū-Whanganui)
In the Canterbury Region Ben Ohau, a mountain in the South Island Ben Ohau Range Ōhau (skifield) Lake Ōhau Lake Ohau Alpine Village Ōhau River (Canterbury) Ōhau A power station Ōhau B power station Ōhau C power station
Elsewhere The Ohau Channel, in the Bay of Plenty, linking Lake Rotorua and Lake Rotoiti Ōhau / West Island the third largest of Manawatāwhi / Three Kings Islands Ohau Peak, a peak in Antarctica