Wardang Island, also known as Waralti is a low-lying 20 km² island in the Spencer Gulf close to the western coast of the Yorke Peninsula, South Australia. It acts as a natural breakwater, protecting the former grain port of Port Victoria and providing a sheltered anchorage. After European colonisation it was used for the grazing of sheep, for rabbit disease research, was quarried for lime to supply the lead smelter at Port Pirie and is currently leased to the island's traditional owners: the Narungga. The much smaller Goose Island and the other rocks and islets in the Goose Island Conservation Park lie off the northern end. Anyone seeking to visit the island must obtain prior permission from the Point Pearce Community Council.