Oberrheinische Tiefebene
The town of Schliengen is located in the Markgräflerland between Müllheim and the district town of Lörrach. The area of the municipality stretches from the Upper Rhine Plain (elev. 225 m/738 ft) to the top of the Blauen or Hochblauen (elev. 1165 m/3,822 ft).