The town takes its name from the explorer John Charles Darke, who was injured in a spear attack by Indigenous people while he was climbing nearby Waddikee Rock on 24 October 1844. Waddikee Rock is a sacred site of the Barngarla people. He died the next day and was buried at the foot of the Rock. Governor Grey expressed a wish that some landform in the region of the grave should be named to honour him. In 1865 surveyor Thomas Evans who was performing a trigonometrical survey of the Gawler Ranges and named the high mount, 'Darke's Peak'.