Barretta is a rural locality in the local government area (LGA) of Kingborough in the Hobart LGA region of Tasmania. The locality is about south-west of the town of Kingston. The 2016 census recorded a population of 41 for the state suburb of Barretta. Barretta is part of the Greater Hobart statistical area.
Barretta was gazetted as a locality in 1965. It is believed that the name was derived from an early settler family named Barrett.
The waters of North-West Bay form most of the eastern boundary.
Route B68 (Channel Highway) runs through from north to south.