Flensburg – Schleswig is an electoral constituency (German: Wahlkreis) represented in the Bundestag. It elects one member via first-past-the-post voting. Under the current constituency numbering system, it is designated as constituency 1. It is located in northeastern Schleswig-Holstein, comprising the city of Flensburg and the Schleswig-Flensburg district. Flensburg – Schleswig was created for the 1976 federal election. Since 2021, it has been represented by Robert Habeck of the Alliance 90/The Greens.