2018 South Australian state election

2018 South Australian state election
Election name	2018 South Australian state election
Country	Australia
Type	parliamentary
Previous election	2014 South Australian state election
Previous year	2014
Next election	2022 South Australian state election
Next year	2022
Election date	17 March 2018

2018 South Australian state election The 2018 South Australian state election was held on 17 March 2018 to elect members to the 54th Parliament of South Australia. The election determined all 47 seats in the South Australian House of Assembly and 11 of 22 seats in the South Australian Legislative Council, concluding the second consecutive four-year term of the Weatherill Ministry led by Premier Jay Weatherill. The contest featured major-party leaders including Liberal leader Steven Marshall and Labor leader Jay Weatherill, with significant participation from minor parties such as the Nick Xenophon Team, Greens South Australia, and the Shooters, Fishers and Farmers Party.

Background

Following the 2014 South Australian state election, the Australian Labor Party under Jay Weatherill formed a minority administration supported by independents Bob Such (until his death in 2014), Dennis Hood (who later joined the Liberal Party of Australia state division), and independents including Martin Hamilton-Smith who defected from the Liberal Party to serve as an independent minister. The parliamentary term saw high-profile ministers such as Tom Koutsantonis and influential policy debates involving the Adelaide Desalination Plant, South Australian Health and Medical Research Institute, and disputes over the Electricity Sector following the 2016 closure of the Northern Power Station at Port Augusta. Federal figures such as Malcolm Turnbull and Bill Shorten campaigned in South Australia given its strategic importance for the Liberal Party of Australia (South Australian Division) and Australian Labor Party (South Australian Branch) ahead of the 2019 Australian federal election. The state experienced controversies including financial pressures on the Royal Adelaide Hospital project and industrial relations disputes involving the Australian Workers' Union and union leaders such as Joe Bullock.

Electoral system

The House of Assembly used single-member electorates with full-preference optional preferential voting following reforms similar to those used federally and in other states, contested under boundaries set by the Electoral Districts Boundaries Commission (South Australia). The Legislative Council used proportional representation with a single transferable vote across the state and a quota system consistent with the Commonwealth Electoral Act principles adapted by the Electoral Commission of South Australia (ECSA). Compulsory enrolment and compulsory voting applied to eligible electors, with early voting and postal voting administered under ECSA protocols. Redistributions prior to the election adjusted seats such as Adelaide and Colton, affecting marginal seats like Finniss and Giles.

Candidates and parties

Major party slates featured the Australian Labor Party (South Australian Branch) led by Jay Weatherill and the Liberal Party of Australia (South Australian Division) led by Steven Marshall. The Nick Xenophon Team (later renamed Centre Alliance) ran candidates in both houses, with prominent figures including Rick Harrison and Rex Patrick contesting Legislative Council positions. The Australian Greens South Australia contested key inner-city electorates such as Adelaide and Unley with candidates including Mark Parnell who served in the Legislative Council. Minor parties fielding candidates included the Family First Party splinter groups, the Shooter, Fishers and Farmers Party, and the Liberal Democratic Party (Australia). High-profile independents such as Geoff Brock and Frank Pangallo contested seats, while sitting members like Peter Malinauskas—then a rising factional figure—were influential within party preselections. Several retiring MPs triggered preselection contests, including former ministers and long-serving backbenchers across both major parties.

Campaign

The campaign saw debates on infrastructure projects including the Adelaide Oval redevelopment legacy, the Morialta electorate local issues, and statewide concerns about energy policy highlighted by personalities such as Matt Canavan and Clive Palmer though their direct involvement was limited. Steven Marshall campaigned on promises to reform the state bureaucracy and address unemployment rates in regional centres such as Whyalla and Mount Gambier. Labor emphasised health and education investments and defended its record on projects like the Adelaide Convention Centre and support for the Renewable Energy sector, attracting attention from figures like Tony Shepherd and policy advocates from Clean Energy Council. The nicknamed "super Saturday" for multiple Australian elections in the period saw cross-campaigning from federal politicians including Christopher Pyne and Trent Zimmerman, while media coverage from outlets such as The Advertiser (Adelaide) and ABC News framed the contest as a test for both state leadership and the influence of minor party leaders like Nick Xenophon.

Results

The Liberals, led by Steven Marshall, won a plurality of seats in the House of Assembly, defeating the incumbent Labor administration. Major seat changes occurred in electorates such as Glynde-adjacent areas and regional seats including Hammond and MacKillop, while Labor retained urban strongholds like Ramsay and Playford. The Nick Xenophon Team performed strongly in the Legislative Council, securing multiple quotas and influencing the balance of power alongside the Greens and minor parties. The outcome altered the composition of parliamentary committees and legislative projections for priorities including energy and health reform, with crossbenchers such as John Darley and Kelly Vincent holding pivotal positions. The two-party-preferred swing reflected broader national trends observed in the 2018 Australian state elections cycle.

Aftermath and government formation

Following the result, Steven Marshall declared victory and formed a minority Liberal government, appointing a ministry that included members from various Liberal factions such as the moderate and conservative wings represented by figures like David Speirs and Vickie Chapman. Jay Weatherill conceded and later resigned as Labor leader, prompting a leadership transition within the Australian Labor Party (South Australian Branch) that saw Peter Malinauskas emerge as a key contender for future leadership and policy direction. Legislative negotiations in the Legislative Council involved deals with the Nick Xenophon Team and Greens South Australia for the passage of bills on energy policy and infrastructure funding. The Marshall Ministry prioritized changes to local government amalgamation policies and revisions to the state's energy mix, leading to new legislative initiatives and ongoing debates involving stakeholders such as SANFL and the University of Adelaide community. The election reshaped South Australian politics and set the stage for subsequent contests including the 2022 South Australian state election.

Category:South Australian state elections