Peake is a town and locality in the Australian state of South Australia situated along the Mallee Highway (B12), approximately 150 kilometres (93 mi) east of the state capital of Adelaide.

The Pinnaroo railway line ran east from the Adelaide to Melbourne line at Tailem Bend to Pinnaroo near the South Australia / Victoria state border. The route continues into Victoria via the Victorian Railways line to Ouyen where it joined the Mildura line.