Mercunda is a town and a locality in the Australian state of South Australia located in the state's south-east about 134 kilometres (83 mi) east of the state capital of Adelaide, and about 52 kilometres (32 mi) north-east and about 53 kilometres (33 mi) south-west respectively of the municipal seats of Karoonda and Loxton.

[5][1] The government town of Mercunda was proclaimed on 5 August 1915 on land in the cadastral unit of the Hundred of Bakara located to the immediate north of the Mercunda Railway Station (previously known as the Mattala Railway Station) on the Waikerie railway line.

[6][3] The locality 's boundaries were created on 11 November 1999 and includes the site of the government town of Mercunda which is located in its approximate centre.

[1] Its name is derived from an aboriginal name formerly used for part of the Canowie Pastoral Run rather than from the Mattala siding which was renamed to match the town before October 1915.

[13] Land use within the locality is entirely ‘primary production’ with use in the southern part of the locality being described by its local government as “principally for agricultural production and the grazing of stock on relatively large holdings.”[14][15] The 2016 Australian census which was conducted in August 2016 reports that Mercunda had a population of 9 people.