Kaiwhaiki is a settlement 18 kilometres (11 mi) upriver from Whanganui, New Zealand.
[1] In Ronaldson's 1847 survey, the inhabitants were noted as being of the hapū Ngāti Rongomaitawhiri.
[3] By the early 1860s, it was described as a "large pa" and its population were mostly Kingites, opposed to the colonial government.
[4][5] It was the birthplace of composer and choirmaster Morvin Simon, who led the nationally known Kaiwhaiki-based kapa haka group Te Matapihi.
A quarry near Kaiwhaiki supplied the shellrock used to build the Durie Hill war memorial tower in Whanganui.