Hardwicke Bay is a locality in the Australian state of South Australia located on the west coast of Yorke Peninsula overlooking the bay also named Hardwicke Bay about 104 kilometres (65 mi) west of the Adelaide city centre and about 9 kilometres (5.6 mi) north of the town of Warooka.
The boundaries of the locality were created on 27 May 1999 for the “long established name” and including the two shack sites known respectively as the “original shack site” and the “Moorowie Shack Site.”
Hardwicke Bay is located within the federal Division of Grey, the state electoral district of Goyder and the local government area of the Yorke Peninsula Council.
The majority land use within the locality is “primary production.”
The 2011 census reported Hardwicke Bay as having a population of 127 people.