Wainui is a rural locality in the Toowoomba Region, Queensland, Australia.

[2] In the 2021 census, Wainui had a population of 8 people.

[1] In the 2016 census, Wainui had "no people or a very low population".

[3] In the 2021 census, Wainui had a population of 8 people.

[1]