Peterborough is a town in the mid north of South Australia, in wheat country, just off the Barrier Highway. It was originally named Petersburg after the landowner, Peter Doecke, who sold land to create the town. It was one of 69 places in South Australia renamed in 1917 due to anti-German sentiments during World War I.

Barrier Highway is a highway in South Australia and New South Wales, and is designated part of route A32. The name of the highway is derived from the Barrier Ranges, an area of moderately high ground in the far west of New South Wales, through which the highway traverses.