The 2018 South Australian local elections were held in November 2018 to elect the councils of 67 of the 68 local government areas (LGAs) in South Australia.

[1] As per usual, no election was held in Roxby Council as it is served by an administrator who performs all the functions of a council.

[3] Three elections partially failed, resulting in follow-up supplementary elections to fill five unfilled positions.

[3] The highest turnout was in Kimba, with 81.0% of voting packs returned, while the highest turnout in the metropolitan area was 34.3% in Holdfast Bay.

[3] A number of councillors joined or left parties before the 2018 elections.