Marion Bay, South Australia

Marion Bay South Australia
Jetty at Marion Bay
Marion Bay
Coordinates	35°14′S 136°58′E / 35.233°S 136.967°E / -35.233; 136.967Coordinates: 35°14′S 136°58′E / 35.233°S 136.967°E / -35.233; 136.967
Population	241 (2011 census)
Established	1872
Postcode(s)	5575
Location	151 km (94 mi) SW of Adelaide
LGA(s)	Yorke Peninsula Council
Region	Yorke and Mid North
County	Fergusson
State electorate(s)	Goyder
Federal Division(s)	Grey
Mean max temp Mean min temp Annual rainfall 20.3 °C 69 °F 13.0 °C 55 °F 432.8 mm 17 in
Localities around Marion Bay: Spencer Gulf White Hut Warooka Spencer Gulf Inneston Marion Bay Foul Bay Inneston Investigator Strait Investigator Strait
Footnotes	Location Climate Adjoining localities

Marion Bay is a small township in the Australian state of South Australia at the southern tip of the Yorke Peninsula. At the 2011 census, Marion Bay had a population of 241.

It is surrounded by beaches and is the gateway to the Innes National Park. The close proximity of the beach and cliffs have popularized Marion Bay as a fishing destination, with Brown Beach in the nearby Innes National Park being particularly famous among recreational fisherman as a picturesque fishing destination.

In 2008, a desalination plant was commissioned to meet the water demands of the summer tourist season. A 60 kL/d sea water reverse osmosis plant now supplies the local caravan park, residents and businesses. The plant was commissioned in response to declining bore water quality and associated problems of corrosion. The plant was designed and constructed by Osmoflo.

Marion Bay is located within the federal Division of Grey, the state electoral district of Goyder and the local government area known as the Yorke Peninsula Council.