2018 South Australian state election

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
 
2009 07 24 Nick Xenophon speaking cropped.jpg
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 Increase 3 Decrease 4 Steady
Popular vote 398,182 343,896 148,360
Percentage 37.97% 32.79% 14.15%
Swing Decrease 6.81 Decrease 3.01 Increase 14.15
TPP 51.94% 48.06%
TPP swing Decrease 1.07 Increase 1.07


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.