Zero Obelisk is a heritage-listed survey marker on the east bank of the Warrego River, Barringun, Shire of Paroo, Queensland, Australia. It was established in 1879. It was added to the Queensland Heritage Register on 21 October 1992. The Zero Obelisk marks the beginning of the first official survey of the border between the colonies of Queensland and New South Wales in 1879-80.

Barringun is a rural locality in the Shire of Paroo, Queensland, Australia. It is on the border of Queensland and New South Wales. In the 2016 census, Barringun had a population of 7 people.