Donnybrook is a coastal town and locality in the City of Moreton Bay, Queensland, Australia. In the 2021 census, the locality of Donnybroo…Donnybrook is a coastal town and locality in the City of Moreton Bay, Queensland, Australia. In the 2021 census, the locality of Donnybrook had a population of 664 people. Donnybrook is 60 kilometres north of Brisbane, the state capital. The closest major population centre is Caboolture, 20 kilometres to the west.