The Bliesgau is a district of the Saarland in Germany. It is named for the River Blies, a tributary of the Saar River and lies near the border with France.
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Blieskastel is the principle town of the district. Other towns in the area include Gersheim and Mandelbachtal. The region forms part of the larger Muschelkalk geological zone.
Historically the district is first recorded in the 10th century when it formed part of the lands of the bishopric of Metz, along with neighbouring St. Ingbert. It was ruled by counts of Bleisgau.