Lacepede Bay (locally /ˈlæsəˌpiːd/ LASS-ə-peed, French: Baie Lacépède) is a bay in the Australian state of South Australia located on the state's south-east coast about 140 kilometres (87 miles) northwest of Mount Gambier and about 240 kilometres (150 miles) southeast of Adelaide.

It was named in 1802 by the Baudin expedition of 1800-03 after Bernard Germain de Lacépède, the French naturalist.

Lacepede Bay was named in 1802 by Peron and Freycinet of the Baudin expedition of 1800-03 after Bernard Germain de Lacépède, the French naturalist.

The bay is described as:[3] The sandy shore is backed by sandhills, gradually decreasing in height, for a distance of 7 nautical miles (13 km) S[outh] of Granite Rocks.

Kingston is situated on the S[outh] side of the entrance to Maria Creek, at the head of the bay.