Cooladdi is a rural town and locality in the Shire of Murweh, Queensland, Australia. The town is 88.9 kilometres south-west of Charleville. Claims have been made that Cooladdi is Australia's smallest town by population. In 2015, the population was 3, all of whom lived at the general store. In the 2021 census, the locality of Cooladdi had a population of 7 people.