In the 1970s, the previously independent villages Biengen, Hausen an der Möhlin, Schlatt and Tunsel, including Schmidhofen, became part of Bad Krozingen.

The neighbouring towns, clockwise from the north, include Breisach am Rhine, Munzigen, a district of Freiburg, Schallstadt, Ehrenkirchen, Staufen im Breisgau, Heitersheim, Eschbach and Hartheim.

The towns Biengen, Hausen an der Möhlin, Schlatt and Tunsel, which were independent until before the Community Reform in Baden-Württemberg in the 1970s, belong to Bad Krozingen.

Open-field, river and place names, such as Neumagen, Möhlin, Kems, Tunsel, Belchen or Rhine, attest to that to the present day.

Judging by the rich burial gifts, it was occupied between 500 and 700 A.D. Krozingen was mentioned for the first time in documents in the books of the monastery of St. Gallen as "Scrozzinga" in the year 808 A.D., probably named after the family of the Alemannic nobleman Crozzo.

The town originated from the old center Oberkrozingen, Kems and Unterkrozingen as an Alemannic village at the junction of the Roman road Basel-Offenburg on the Neumagen.

Krozingen was part of the Breisgau district of Further Austria until it was transferred to the Electorate of Baden in Peace of Pressburg in 1805 and it had different overlords.

The towns Biengen, Hausen an der Möhlin, Schlatt and Tunsel, which were independent until the administrative reform in the 1970s, became part of Bad Krozingen in 1972 and 1973.

After passing his A-level exams, he joined the German Airforce for basic military service, and was stationed in Leipheim, Fürstenfeldbruck und Memmingen.

In 1994, he changed his position to become the head of the forestry district of Mooswald for the city council of Freiburg im Breisgau.

Kieber also serves as a regional council, as well as being a member of the supervisory boards of the University Heart Center Freiburg-Bad Krozingen, the hospitals Theresienklinik I and Theresienklinik II, and the spa and wellness provider Kur- und Bäder GmbH Bad Krozingen.

A derivation from the wheel in the coat of arms of the local gentry, on the other hand, seems unlikely, as does the interpretation as an arrow inserted into a crossbow (as suggested by Stadler), or even an explanation as the Eye of God floating above the globe.

In 1921, the emblem used so far was embellished with the golden beams commonly used in depictions of the Eye of God, and this new version was established as the official coat of arms.

Bad Krozingen is a member of the Transnational Joint Board Mittelhardt-Oberrhein, an organization established to advance the cooperation between towns and municipalities across the French-German border, in the neighboring regions of Alsace (France) and South_Baden (Germany).

The museum in Biengen Town Hall opened in July 2005 after two years of preparation and a lot of voluntary work.