The 2003 Bavarian state election was held on 21 September 2003 to elect the members to the 15th Landtag of Bavaria. The Christian Social Union (CSU) led by Minister-President Edmund Stoiber achieved the largest majority in German history, winning 69% of the seats in the Landtag. This election was the first and to date only time a single party won a two-thirds supermajority of seats in any German state parliament. The CSU also won its largest proportion of the popular vote since 1974, at 60.7%.
The election was marked by a major decline in turnout, falling by almost 13 points to 57%. As a result, despite achieving its best result in decades, the CSU won 230,000 votes fewer than it had in the 1998 election.
