The 2009 Hessian state election was held on 18 January 2009 to elect the members of the Landtag of Hesse. The election was called after the failure of all government formation attempts conducted after the 2008 state election held a year earlier. The Social Democratic Party (SPD) suffered major losses, falling from an effective tie with the Christian Democratic Union (CDU) to a 13.5-point deficit. The Free Democratic Party (FDP) and The Greens were the primary beneficiaries of the SPD's decline. After the election, the CDU formed a coalition government with the FDP, and Roland Koch was elected Minister-President.

The 2008 Hessian state election was held on 27 January 2008 to elect the members of the Landtag of Hesse. The incumbent Christian Democratic Union (CDU) government led by Minister-President Roland Koch lost its majority. The result of the election was extremely close but inconclusive, with the CDU winning just 3,500 votes (0.1%) more than the Social Democratic Party (SPD). Due to the entrance of The Left to the Landtag, neither the CDU–FDP or SPD–Green bloc garnered a majority. After a year of failed attempts to form government, a new election was held.