Konstanz is an electoral constituency (German: Wahlkreis) represented in the Landtag of Baden-Württemberg.

Since 2026, it has elected one member via first-past-the-post voting. Voters cast a second vote under which additional seats are allocated proportionally state-wide. Under the constituency numbering system, it is designated as constituency 56.

It is wholly within the district of Konstanz.

Geography The constituency includes the municipalities of Allensbach, Gaienhofen, Konstanz, Moos, Öhningen, Radolfzell am Bodensee, and Reichenau within the district of Konstanz.

There were 102,441 eligible voters in 2026.

Members First mandate Both prior to and since the electoral reforms for the 2026 election, the winner of the plurality of the vote (first-past-the-post) in every constituency won the first mandate.

Election Member Party % 1976 Klaus von Trotha CDU 1980 1984 1988 1992 1996 2001 Andreas Hoffmann 39.7 2006 40.6 2011 Siegfried Lehmann Grüne 34.7 2016 Nese Erikli 39.6 2021 42.1 2026 36.8

Second mandate Prior to the electoral reforms for the 2026 election, the seats in the state parliament were allocated proportionately amongst parties which received more than 5% of valid votes across the state. The seats that were won proportionally for parties that did not win as many first mandates as seats they were entitled to, were allocated to their candidates which received the highest proportion of the vote in their respective constituencies. This meant that following some elections, a constituency would have one or more members elected under a second mandate.

Prior to 2011, these second mandates were allocated to the party candidates who got the greatest number of votes, whilst from 2011-2021, these were allocated according to percentage share of the vote.

Prior to 1996, this constituency did not elect any members on a second mandate.

Election Member Party 1996 Günther Schäfer Grüne 2001 2006 Siegfried Lehmann Grüne 2011 2016 Jürgen Keck FDP 2021

Election results 2026 election

References

See also Politics of Baden-Württemberg Landtag of Baden-Württemberg