Hallett is a small town in Mid North region of South Australia, situated on the Barrier Highway 32 kilometres north of Burra and 38 kilometres south-east of Jamestown, Hallett lies close to Goyder's Line, plotted in the nineteenth century by George Goyder, separating the land suitable for cropping from the land suitable for grazing. The town was named for pioneering pastoralist and politician John Hallett, and laid out on his property "Willogoleechee".