The Dingo Fence or Dog Fence is a pest-exclusion fence that was built in Australia during the 1880s and finished in 1885, to keep dingoes out of the relatively fertile south-east part of the continent (where they had largely been exterminated) and protect the sheep flocks of southern Queensland. It is one of the longest structures on the planet, and the world's longest fence. It would eventually stretch 5,320 km (3,306 mi) from Jimbour on the Darling Downs near Dalby through thousands of miles of arid country to the Eyre peninsula on the Great Australian Bight.

The 2,500km section of the fence in Queensland is also known as the Barrier Fence or Wild Dog Barrier Fence. It is administered by the Department of Natural Resources and Water. The Wild Dog Barrier Fence staff has 23 employees, with two person teams which patrol a 300km section of the fence once every week. There are depots at Quilpie and Roma.

It joins the Border Fence in New South Wales, where it stretches for 584km along Latitude 29. The fence passes the point where the three states of Queensland, New South Wales and South Australia meet (Cameron's corner), where there is a brass plate on the survey monument. It is known as the Dog Fence in South Australia, which is 2,225km long.

The fence is 180cm high made of wire mesh, and extends for 30cm underground. The fence line on both sides is cleared to a 5m width. Star pickets are spaced every 9m. At first it was unsuccessfully used to try and keep out rabbits, with the fence built originally as a rabbit proof fence in 1884. It was more successful at keeping out pigs, kangaroos, emus and brumbies. In 1914 it was converted into a dog-proof fence.