For the local government elections held in November, see 2018 South Australian local elections.
2018 South Australian state election
← 2014
17 March 2018
2022 →
All 47 seats in the South Australian House of Assembly 24 seats were needed for a majority 11 (of the 22) seats in the South Australian Legislative Council
First party
Second party
Third party
Leader
Steven Marshall
Jay Weatherill
Nick Xenophon
Party
Liberal
Labor
SA-Best
Leader since
4 February 2013
21 October 2011
4 July 2017
Leader's seat
Dunstan
Cheltenham
None (contested Hartley)
Last election
22 seats
23 seats
Did not exist
Seats won
25
19
0 seats
Seat change
3
4
Popular vote
398,182
343,896
148,360
Percentage
37.97%
32.79%
14.15%
Swing
6.81
3.01
14.15
TPP
51.94%
48.06%
TPP swing
1.07
1.07
Results by electoral division by first preference vote and two-party-preferred vote
Results by electoral division, showing seats gained and held by each party
Premier before election
Jay Weatherill
Labor
Elected Premier
Steven Marshall
Liberal
The 2018 South Australian state election to elect members to the 54th Parliament of South Australia was held on 17 March 2018. All 47 seats in the House of Assembly or lower house, whose members were elected at the 2014 election, and 11 of 22 seats in the Legislative Council or upper house, last filled at the 2010 election, were contested. The record-16-year-incumbent Australian Labor Party (SA) government led by Premier Jay Weatherill was seeking a fifth four-year term, but was defeated by the opposition Liberal Party of Australia (SA), led by Opposition Leader Steven Marshall. Nick Xenophon's new SA Best party unsuccessfully sought to obtain the balance of power.
Like federal elections, South Australia has compulsory voting, uses full-preference instant-runoff voting for single-member electorates in the lower house and optional preference single transferable voting in the proportionally represented upper house. The election was conducted by the Electoral Commission of South Australia (ECSA), an independent body answerable to Parliament.
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