Lucky Bay is a locality in the District Council of Franklin Harbour, on the Spencer Gulf coast of Eyre Peninsula in South Australia. It is a terminus for SeaSA's Spencer Gulf passenger ferry and a transshipping port for grain export operated by T-Ports. Lucky Bay is located immediately north-east of the Franklin Harbour wetlands. Its adjacent waters lie within the outer boundary of the Franklin Harbor Marine Park. A ferry service crossing Spencer Gulf from Lucky Bay to Wallaroo commenced in 2006, and the dirt road connecting Lucky Bay with the Lincoln Highway was sealed in 2008.