1958 Hessian state election

The 1958 Hessian state election was held on 23 November 1958 to elect the 4th Landtag of Hesse. The outgoing government was a coalition of the Social Democratic Party (SPD) and All-German Bloc/League of Expellees (GB/BHE) led by Minister-President Georg-August Zinn.

The election saw major losses for the Free Democratic Party (FDP) matched by gains for the SPD and Christian Democratic Union (CDU), which established itself as the major opposition to the SPD-led government. The FDP finished on 10%, its worst result since the inaugural postwar elections in 1946. The SPD's coalition partner the GB/BHE remained steady on 7%, and the government was renewed for a second term.

Electoral system
The Landtag was elected via mixed-member proportional representation. 48 members were elected in single-member constituencies via first-past-the-post voting, and 48 then allocated using compensatory proportional representation. A single ballot was used for both. An electoral threshold of 5% of valid votes is applied to the Landtag; parties that fall below this threshold are ineligible to receive seats.

Background
In the previous election held on 28 November 1954, the SPD suffered small losses and fell to 43%, but remained clearly the largest party. The CDU emerged as the second largest party by a small margin as the FDP fell to 20%. The GB/BHE ran independently and won 8%, subsequently forming a coalition with the SPD.

Parties
The table below lists parties represented in the 3rd Landtag of Hesse.