Vivonne Bay is a locality in the Australian state of South Australia located on the south coast of Kangaroo Island overlooking the body of water known in Australia as the Southern Ocean and by international authorities as the Great Australian Bight and which includes the bay known as Vivonne Bay. It is located about 174 kilometres (108 miles) southwest of the state capital of Adelaide and about 55 kilometres (34 miles) southwest of the municipal seat of Kingscote.

Human settlement started in what is now is the locality as the town of Vivonne which was surveyed during August 1908, named after the adjoining bay and proclaimed as a government town by Governor Bosanquet on 19 May 1909. The locality’s boundaries were created in May 2002 which includes both the former government town of Vivonne and the Harriet River Shack Site, was given the “long established name” which is also derived from the adjoining bay.

Vivonne Bay is bounded by the southern coast of Kangaroo Island and includes the following coast features (from west to east) - Cape Kersaint, Point Ellen and the bay known as Vivonne Bay. Two rivers, the Harriet and the Eleanor, flow throughout the locality to discharge into the bay. A dune system known as Little Sahara is located near the locality’s eastern boundary. The South coast Road passes through the locality from west to east and connects to a settlement is located on the site of the former shack site via a side road. Facilities associated with the settlement include a general store located on the South Coast Road, an outdoor education facility operated by the Sealink Travel Group and a camping ground operated by the Kangaroo Island Council. The protected area known as the Vivonne Bay Conservation Park is located on the coastline immediately west of both Point Ellen and the bay.

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