The 2018 Bavarian state election took place on 14 October 2018 to elect the 180 members of the 18th Landtag of Bavaria. The outgoing government was a majority of the Christian Social Union in Bavaria (CSU), led by Minister President Markus Söder.

The CSU recorded its worst result since 1950 with 37% of votes, a decline of over ten percentage points, although it remained by far the largest party in the Landtag. The SPD, which had previously been the second largest party, fell to fifth place with just 10%. The Greens gained 9 points and emerged as the second strongest party with 17.5%. The Free Voters of Bavaria (FW) gained 2.6 points and finished third with 11.6% of the total vote. The Alternative for Germany (AfD), which ran in Bavaria for the first time, placed fourth with 10%. The Free Democratic Party (FDP), which failed to enter the Landtag in 2013, narrowly re-entered with 5.1%, becoming the smallest party. Turnout rose to 72%, up 9 points from under 64% in 2013.

2018 Bavarian state election

The election was influenced by the condition of the federal CDU/CSU–SPD government following two crises in the preceding months: the so-called asylum quarrel in June and July followed by the controversy around Hans-Georg Maaßen in September. CSU leader Horst Seehofer played a major role in both events. Four days before the Bavarian election, federal SPD leader Andrea Nahles criticised Chancellor Angela Merkel, accusing her of a "lack of leadership".

2018 Bavarian state election

As a result of the election, the CSU lacked a majority and formed a coalition government with the Free Voters.

2018 Bavarian state election

Election date and preparation deadlines

According to the Bavarian Constitution, the election must be held on a Sunday "at the earliest 59 months, at the latest 62 months" after the preceding state elections which took place on 15 September 2013. This would theoretically allow an election date between 19 August and 11 November 2018, but in practice the elections since 1978 have always taken place between mid-September and mid-October. The Bavarian state government proposed 14 October 2018 as the election date on 9 January 2018 and officially set it on 20 February after hearing the parties to the state parliament.

The deadline for determining the population figures, which are decisive for the distribution of the 180 Landtag mandates among the seven Bavarian administrative districts and a possible new division of the constituencies, was 15 June 2016 (33 months after the election of the previous Landtag). On this basis, the Bavarian Ministry of the Interior had to submit a constituency report to the Landtag until 36 months after the election This was done on 6 September 2016.

Delegates to the internal constituency meetings could be appointed at the earliest 43 months after the preceding election, i.e. since 16 April 2017. The actual district candidates had been eligible since 16 July 2017. The parties and other organised electoral groups which had not been represented continuously in the Bavarian Land Parliament or in the German Bundestag since their last election on the basis of their own election proposals (CDU, CSU, SPD, Free Voters of Bavaria, Alliance 90/The Greens, FDP, Die Linke, AfD) had to notify their intention to participate to the State Election Commissioner by the 90th day before the election, i.e. by 16 July 2018 at the latest. The actual election proposals and any necessary signatures had to be submitted by 2 August 2018.